1. Which refers to the recorded observations and measurements in an explanation?
A. Conclusion
B. Data
C. Graph
D. Variables
2. How is hypothesis tested?
A. By gathering enough information about the problem
B. By making inferences
C. By conducting experiment
D. By formulating conclusion
3. Which summarizes a natural occurrence that may be constantly observed given the same conditions which may be expressed in words or in mathematical form?
A. Conclusion
B. Hypothesis
C. Law
D. Theory
4. Ruben prepares a solution by putting a pinch of orange crystals to water in a beaker, then by consistent stirring, the crystal dissolve. Which of the statements above are likely to be observed by Ruben?
I. The water becomes orange.
II. The color of the solution becomes darker.
III. Crystals disappear from the bottom of the beaker.
IV. The beaker and its contents become heavier as attiring continues.
A. I and II only
B. III and IV only
C. I, II, and III only
D. I, II, and IV only
5. Which of the following is NOT true about scientific method?
A. Conclusion is the last step
B. Scientific method may be applied in every life.
C. Scientific method is a systematic way of solving problem.
D. Scientific method is done by following a step-by-step procedure in an exact sequence.
6. Which apparatus will you use to measure the mass of an irregular solid correctly?
A. Empty beaker
B. Erlenmeyer flash
C. Graduated cylinder with water
D. Vernier caliper
7. To graph the distance covered and velocity of a car, which is the dependent variable? Where should be it plotted on a line graph?
A. Distance, x axis
B. Distance, y-axis
C. Velocity, x-axis
D. Velocity, y-axis
8. A student found a piece of metal. What can the student to do quickly determine if the metal might contain iron?
A. Heat the metal
B. Weight the metal
C. Place the metal in water
D. Place the metal near the magnet
9. A student dipped a strip of aluminum and a strip of iron in water. The student then exposed the strips to air for one week. Which was most likely observed one week later?
A. The iron strip formed rust.
B. The aluminum strip formed rust.
C. Both of the metal strips formed rust.
D. Neither of the metal formed rust.
10. What human activity has added the most carbon in the atmosphere?
A. Burning fossils fuels
B. Mining fossil fuel
C. Increasing soil erosion
D. Cutting down the rain forests
11. The Table below lists measurements tasks included in laboratory activities conducted by students in a Grade 9 science class. Which matches a measurement task with the correct measurement tools?
A. I
B. II
C. III
D. IV
12. Aubrey wants to track her summative tests scores over the course of the first grading period. Which of the following will BEST allow her to analyze her progress?
A. Bar graph
B. Line graph
C. Pie graph
D. Scatter graph
13. What will most likely occur if global warming will not be addressed?
A. Lower se levels
B. Melting of ice cups
C. More pollution in water
D. More reflected sunlight off the ice pack
14. How is the relationship described when both quantities are increasing but one quantity increases faster than the other.
A. Direct proportion
B. Direct square proportion
C. Inverse proportion
D. Inverse square proportion
15. In your attempt to determine which is denser oil or water, you mixed 25 ml of oil with 25ml of water. What helpful qualitative data can you derive from the set-up?
A. There are 50 ml of liquid in the container.
B. Oil did not mix with water.
C. Oil is on top of the water.
D. There are 25 ml of water and 25 ml of oil in the container.
16. Which of the following is a compound?
A. Cemented wall
B. Dry ice
C. Gold
D. Tincture of iodine
17. Which is most likely to change the blue litmus paper to red?
A. Ammonia in water
B. Detergent solution
C. Lime water
D. Vinegar
18. Which can be classified as homogeneous mixture?
I. Buko pie
II. Blood
III. Virgin coconut oil
IV. Mango juice
A. III only
B. I and II only
C. I, III, and IV only
D. II,III and IV only
19. Which of the following is a physical property of non-metals?
A. Malleability and ductility
B. Low tensile strength
C. High density
D. High tensile strength
20. The yellow color of a highlighter is a property.
A. chemical
B. heterogeneous
C. homogeneous
D. physical
21. An odorless and colorless matter boils at 100 ℃ and melts at 0 ℃ What inference can be drawn from this observation?
A. It is a metal.
B. It is a mixture
C. It is a non-metal.
D. It is a pure substance.
22. You want to clean a tarnished silver. Which one will you use?
A. Baking soda
B. Salt solution
C. Sugar solution
D. Vinegar
23. What will you add to your food to make it last longer?
A. Baking soda
B. Salt solution
C. Tomato
D. Vinegar
24. Why is it not advisable to drink soft drinks on an empty stomach?
A. It could lessen your appetite.
B. It could make you feel full faster.
C. It increases the acidity of your stomach.
D. It contains stimulant which causes dizziness.
25. Almost the entire mass of an atom is concentrated in the ?
A. electron
B. neutron
C. nucleus
D. proton
26. How many protons are present if an atom has a mass number of 23 and atomic number of 11?
A. 11
B. 12
C. 23
D. 44
27. Carbon-12 atom has .
A. 6 electrons, 6 protons, 6 neutrons
B. 6 electrons, 12 protons, 6 neutrons
C. 12 electrons, 6 protons, 6 neutrons
D. 16 electrons, 6 protons , 6 neutrons
28. What happens to the atomic number during a chemical reaction?
A. Changes
B. Remains the same
C. Changes the alternately
D. Changes and then is restored
29. Which of the following statements about isotopes of hydrogen is correct?
A. They have different atomic numbers.
C. They have the same number of neutrons .
B. They have the same number of protons.
D. They have different number of electrons.
30. Which of the following has 16 electrons?
A. 2713A1+3
B. 3517C1-1
C. 3216S
D. 3216S-2
31. How many protons, neutrons and electrons are there in an atom of 19779Au?
A. 79 protons, 79 electrons, and 118 neutrons
B. 79 protons, 79 electrons, and 197 neutrons
C. 197 protons, 79 electrons, and 79 neutrons
D. 79 protons, 79 electrons, and 158 neutrons
32. The electrons configuration of an atom of element R in the ground state is 1s22s22p63s23p64d9. What is the element described?
A. 8Cd
B. 35Br
C. 31Ga
D. 27Co
33. What is the shape of the molecule BeC12?
A. Linear
B. Angular
C. Trigonal planar
D. Tetrahedral
34. The generalized electron configuration of this group of element is [Noble gas] ns2ns. Identify its group and family.
A. Group VII and Family A
B. Group V and Family A
C. Group III and Family B
D. Group I and Family B
35. What is the position of 12Mg in the periodic table of elements?
A. Group I-A, Period 2
B. Group III-A, Period 2
C. Group II-A, Period 3
D. Group II-B, Period 4
36. What happens when a metal react with a nonmetal ? Usually .
A. a simple covalent bond is formed
B. a coordinate covalent bond is formed
C. positive and negative ions are formed
D. there is sharing of electrons in the outer shells of two elements
37. What bond exists in a solid that does not conduct electricity but conducts electricity when dissolved in water?
A. Coordinate covalent bond
B. Covalent bond
C. Ionic bond
D. Metallic bond
38 .Which of the following statements about a triple bond is CORRECT?
A. Compounds with triple bonds are not reactive.
B. An example of a molecule with a triple bond is C2H6.
C. Triple bond is weaker than single and double bonds.
D. Three pairs of electrons can hold two atoms together stronger than two pairs.
39. Which chemical bond will most likely exists if element A has an electron configuration of 1s22s22p3 and element B has 1s22s22p5??
A. Coordinate covalent
B. Ionic
C. Metallic
D. Polar covalent
40. X, Y, and Z represent elements of atomic numbers 9, 11, and 16. What type of bond will be performed between Y and Z?
A. Ionic bond
B. Metallic bond
C. Nonpolar covalent bond
D. Polar covalent bond
41. A week attraction between hydrogen atom in one molecule and an oxygen in other called .
A. covalent bond
B. Hydrogen bond
C. Ionic bond
D. Metallic bond
42. Which of the following substances is most likely a covalent compound ?
A. CaCO3
B. KNO3
C. SO2
D. NaOH
43. What is the element needed to bond with Na to create the most ionic bond?
A. F
B. C1
C. Br
D. I
44. The boiling point of substance A is higher than that of substance B. What does this meaning?
A. Substance A is less viscous than substance B.
B. Substance A evaporates faster than substance B.
C. Substance B has greater surface tension than substance A.
D. Substance B has weaker intermolecular forces than substance A.
45. What is the intermolecular force of attraction between the nucleus of one atom and the electrons of a nearby atom?
A. Dipole-dipole force
B. Ion-dipole force
C. London dispersion force
D. Van der Waals force
46. Which of the following has the greatest number of atom?
A. Ca(OH)2
B. A12O3
C. NaHCO3
D. C2H2
47. What does a triangle , which is placed in a chemical equation indicate?
A. Changes happened
B. Heat is applied
C. Gas is evolved
D. Precipitate
48. What would most probably be the resulting chemical formula when Mg+2and O-
2combine?
A. MgO
B. Mg2O2
C. MgO2
D. Mg4O4
49. Which of the following is an example of combustion reaction?
A. Mg+C12 > MgC12
B. CaCO3 > CaO + CO2
C. 2 C4H10 + 13 O2 > 8 CO2 + 10 H2O
D. AgNO3 + NaC1 > AgC1 + NaNO3
50. What type of chemical reaction is involved in Ca(S) + 2H2O Ca(OH)2(aq)?
A. Combination
B. Decomposition
C. Single-displacement
D. Double-displacement
51. When the fuel in a butane gas stove undergoes complete combustion, it reacts with oxygen to form carbon dioxide and water:_C4H10 + _ O2CO2+_H2O. Which set of coefficients can be BEST used in balancing the equation?
A. 1, 1, 4, 2
B. 2, 2, 4, 5
C. 2, 8, 13, 10
D. 2, 13, 8, 10
52. In oxidation-reduction, the oxidizing agents is reduced and gains electrons. The reducing agent is oxidized and loses electrons. Are the statements CORRECT?
A. Both statements are correct.
B. Both statements are false
C. First statement is true; second statement is false.
D. Second statement is true; first statement is false.
53. How many moles of iron does 25 g of Fe represent? (Fe=55.85 g)
A. 0.448 mol
B. 2.234 mol
C. 30.85 mol
D. 80.85 mol Ans: A. 0.448 mol
- (25 g) / ( 55.85 g/mol ) =0.448 mol
54. What is the mass of 5.0 mol of water? (1 mol H2O=18.02g)
A. 3.60 g
B. 13.02 g
C.23.02 g
D. 90.10 g Ans: C. 90.10 g
-(5 mol) (18.02 g/mol ) = 90.10 g
55. An analysis of salt shows that it contains 56.58 g potassium; 8.68 g carbon and
34.73 oxygen. What is the empirical formula of the substance?
A. KC2O3
B. K2CO2
C. K2CO3
D. K2C3O
56. Which of the following is NOT a principal assumption of Kinetic Molecular Theory?
A. Gas particles move rapidly.
B. Gases consists of submicroscopic particles.
C. There is very little empty space in a gas.
D. Gas particles have no attraction for one another.
57. Based on the Kinetic Molecular Theory, a gas can be compressed much more than a solid or liquid because .
A. gas particles move rapidly
B. the particles of a gas are very far apart
C. a gas is composed do not attract or repel one another
D. gas particles do not attract or repel one another
58. Which refers to the kinetic energy or motion of gas particles?
A. Pressure
B. Quantity of gas
C. Temperature
D. Volume
59. A given mass of gas has a volume of 750 ml at -25℃ and 280 torr. What would the volume of the gas be at 30 and 560 torr of pressure considering the amount of gas which is constant?
A. 450 ml
B. 458 ml
C. 480 ml
D. 520 ml
Ans: B. 458 ml
This item involves combined gas law : P1V1 = P2V2
T1 T2
60. Seven liters of an ideal gas are contained at 3.5 atm and 30 How many moles of this gas are present?
A. 0.50 mol
B. 0.75 mol
C. 1.00 mol
D. 1. 25 mol
61. What is the BEST reason why the atmospheric pressure in Baguio City is lower than the atmospheric pressure at sea level?
A. Because there are more gas particles at higher altitudes
B. Because there are less gas particles at higher altitudes
C. Because there are greater temperature at higher altitudes
D. Because there is lesser temperature at higher altitudes
62. Which of the following correctly describes the process of exhalation (air going out of the lungs)?
A. The lungs decrease in volume, causing the internal pressure to increase.
B. The lungs decrease in volume, causing the internal pressure to decrease.
C. The lungs increase in volume, causing the internal pressure to increase.
D. The lungs increase in volume, causing the internal pressure to decrease.
63. What is the closed, continuous path through which electrons can flow?
A. Charge
B. Circuit
C. Resistor
D. Voltage
64. What will be your charge if you scrape electrons from your feet while scuffing across the rug?
A. Negative
B. Neutral
C. Positive
D. Not enough information given
65. How is food cooked faster using a pressure cooker?
A. The accumulated steam increases the pressure and decreases the boiling point of the liquid.
B. The accumulated steam increases the pressure and increases the boiling point of the liquid.
C. The accumulated steam decreases the pressure and increases the boiling point of the liquid.
D. The accumulated steam decreases the pressure and decreases the boiling point of the liquid.
66. Which of the following is NOT a characteristic of a base?
A. Bitter taste
B. Slippery feeling
C. Able to change litmus from red to blue
D. Reacts with carbonates to produce carbon dioxide
67. Which of the following statements about acid and base is TRUE?
A. Baking soda is acidic.
B. Both acids and bases conduct electricity.
C. The concept of H3O+ was introduced by Arrhenius.
D. The end point is reach when the color of the indicator in titration changes.
68. What is the pH of the solution with an [H+] of 1.00 x 10-11?
A. 1
B. 3
C. 7
D. 11
69. Which of the following is the most acidic?
A. Calamansi juice
B. Carbonated drink
C. Urine
D. Vinegar
70. Acid rain is formed when sulfur oxides react with water in air. It causes lakes and streams decrease in pH which makes it unable to support fish and plant life. Which is the LEAST means of solving this problem?
A. Limestone may be added to the water basins.
B. Neutralize sulfur oxides with basic compounds.
C. Reduction of sulfur emissions from the industrial establishments.
D. Providing absorbent colloidal materials to screen acid rain before hitting the water.
71. Which of the following would decrease the rate in which a solid dissolves in a liquid?
A. Supersaturating the solution
B. Applying pressure into the solution
C. Grinding the solid into smaller pieces
D. Increasing the temperature of an exothermic reaction
72. Which factors affects the rate of dissolution when powdered sugar dissolves more rapidly than granulated sugar?
A. Application of heat
B. Nature of solute
C. Particle size
D. Stirring
73. In which factor is the description “like dissolves like” BEST used?
A. Volume
B. Pressure
C. Temperature
D. Nature of solute and solvent
74. When the production of hydrogen ions in the body is the same as their loss, you are in .
A. acid-base balance
B. electricity balance
C. water balance
D. balance diet
75. What is the mass percent of Na2SO4 in a solution made by dissolving 25 g Na2SO4 in 225 g H2O?
A. .01%
B. 1%
C. 10% D.20%
76. What is the mole fraction of 100 g ethanol (C2H6O) mixed in 100 g water?(C=12 H=1 O=16)
A. 0.28
B. 2.17
C. 5.56
D.7.73
77. What is the molarity of the solution containing 1.4 mol of acetic acid (HC2H3O2) in 250 ml of solution?
A. 4.5M
B. 5.6M
C. 6.5M
D. 7.6M
78. What is the normality of a 2M solution of H3PO4?
A. 2 N
B. 3 N
C. 5 N
D. 6 N
79. When egg yolk is added to oil and water vinegar to make mayonnaise, the egg yolk serves as .
A. coagulant
B. emulsifying agent
C. solvent
D. surfactant
80. Which of the following involves adsorption?
A. Plating the copper on a steel object
B. Adherence of paint to wood surfaces
C. Brown color of the eyes of the Filipinos
D. Remobal of odor inside a refrigerator using charcoal
81. Which of the following BEST describes temperature?
A. Temperature measures the total energy in something.
B. Temperature measures the kinetic energy in substance.
C. Temperature measures the total kinetic energy contained in an object.
D. Temperature measures the average molecular kinetic energy in substance.
82. The Earth receives tremendous heat coming from the sun which could be beneficial at one point and harmful to a large extent. Which of the following methods of transferring heat is being illustrated?
A. Conduction
B. Convection
C. Radiation
D. Transduction
83. A reaction takes place endothermically. Which of the following statements BEST describes endothermic reactions?
A. The temperature of the system drops.
B. The temperature of the surrounding rises.
C. The temperature of the surrounding drops.
D. The temperature of the surrounding remains the same.
84. Which of the following statements on specific heat is TRUE?
A. It is an extrinsic property.
B. It is always equal to the heat capacity.
C. It is the heat capacity per mole of a substance.
D. It is equal to zero when the heat capacity is zero.
85. The entropy usually increase when .
I. A molecule is broken into two or more smaller molecules
II. A reaction occurs that results in an increase in the number of moles of gas
III. A solid changes to a liquid
IV. A liquid changes to a gas
A. I and II only
B. III and IV only
C. I, II and III only
D. I, II, III, and IV
86. Change in enthalpy for combustion of fuel is .
A. negative
B. positive
C. zero
D. may be negative or positive
87. According to the collision theory, when does a chemical reaction occur?
A. If the colliding molecules have energy equal to greater than the activation energy.
B. If the colliding molecules have lesser than the activation energy.
C. If the colliding molecules bouncing apart did not change.
D. If there is no collision among molecules.
88. Which situation appears to violate the collision theory?
A. The reaction rate increases as temperature increases.
B. The reaction rate decreases as the reaction mixture is cooled.
C. The reaction rate increases as the surface area of the reactants increases.
D. A reaction rate takes more rapidly when the concentration of the reactants is decreased.
89. Which statements is TRUE about catalysts?
A. They increase the rate of reaction by increasing the activation energy.
B. They provide alternative reaction paths with lower activation energies.
C. The amount of catalyst decreases as the reaction progresses.
D. They are used up in the reaction.
90. Milk turns sour in one or two days when left at room temperature and yet can remain unspoiled for two weeks when refrigerated. What explains this?
A. Decrease in temperature speeds up reaction rate.
B. Decrease in temperature slows down reaction rate.
C. Milk becomes less concentrated when placed in refrigerator.
D. Milk becomes more concentrated when placed in refrigerator.
91. What factor affects sawdust to burn faster than a block of wood?
A. Concentration of reactant
B. Presence of catalyst
C. Surface area of reactant
D. Temperature
92. Which of the following observation is NOT true whenever a system is in chemical equilibrium?
A. Attainment of equilibrium requires time.
B. The rates of opposing reactions are equal.
C. The products do not change back to reactants.
D. Concentration remain constant at equilibrium even though the opposing reactions are continuing.
93. Which refers to the recorded observations and measurements in an explanation?
A. Conclusion
B. Data
C. Graph
D. Variables
94. How is hypothesis tested?
A. By gathering enough information about the problem
B. By making inferences
C. By conducting experiment
D. By formulating conclusion
95. Which summarizes a natural occurrence that may be constantly observed given the same conditions which may be expressed in words or in mathematical form?
A. Conclusion
B. Hypothesis
C. Law
D. Theory
96. Which of the following is also known as paraffin or saturated hydrocarbon?
A. Alkane
B. Alkene
C. Alkyne
D. Cycloalkane
97. Which of the following is NOT true about scientific method?
A. Conclusion is the last step
B. Scientific method may be applied in every life.
C. Scientific method is a systematic way of solving problem.
D. Scientific method is done by following a step-by-step procedure in an exact sequence.
98. Which of the following are properties of organic compound? High melting point
Low boiling point
High solubility in water
Non-conductor of electricity
A. I and II
B. I and III
C. II and III
D. II and IV
99. What is the classification of an organic compound with the formula CH3-O-CH3?
A. Alcohol
B. Ether
C. Phenol
D. Thiol
100. Which apparatus will you use to measure the mass of an irregular solid correctly?
A. Empty beaker
B. Erlenmeyer flash
C. Graduated cylinder with water
D. Vernier caliper
101. Which of the following is an organic compound?
A. Baking soda
B. Glucose
C. Limestone
D. Sulfuric acid
102. Which of the following serves as thermal insular in the body?
A. Carbohydrates
B. Fats
C. Nucleic acids
D. Proteins
103. In DNA, which is the correct complementary pairing of the nitrogenous bases?
A. AG and CT
B. AA and GG
C. AC and GC
D. AT and GC
104. Which biomolecule is considered the building blocks of tissues and organs?
A. Carbohydrates
B. Lipid
C. Nucleic acid
D. Protein
105. What is the main function of the hormone oxytocin in the body?
A. Controls water secretion by the kidneys
B. Stimulates conversion of glycogen to glucose
C. Controls blood – glucose level and storage of glycogen
D. Stimulates contraction of the uterine muscles and secretion of milk by the mammary glands
106. The half-life of thorium-234 is 24 days. How much 5g of 234th would be left after 48 days?
A. 0.625 g
B. 1.25 g
C. 2.50 g
D. 3.75 g
107. What happens when there is a loss of an alpha particle from the nucleus?
A. No change in the mass number or atomic number
B. Loss of 4 in the mass number, loss of 2 in the atomic number
C. Loss of 2 in the mass number, loss of 4 in the atomic number
D. No change in the mass number, increase of 1 in the atomic number
108. What is the balanced equation of 7031Ga that undergoes beta decay?
A. 7031Ga > 7031X + 00β
B. 7031Ga >7032X + 0-1β
C. 7031Ga >7031X + 0-1β
D. 7031Ga > 7131X + -10β
109. What is the medical application of the isotope P-32 with a half-life of 4.3 days?
A. Liver imaging
B. Gastrointestinal diagnosis
C. Treatment of leukemia
D. Treatment of hyperthyroidism
110. Which of the following poses a serious obstacle to the development of commercial fusion power plants?
A. Scarcity of deuterium
B. Public concern about safety
C. Dwindling supply of uranium
D. Exceedingly high activation energy
111. A radioisotope is considered a tracer when it used to .
A. kill cancerous tissues
B. Kill bacteria in food
C. Determine the age of artifacts
D. Determine the way plants absorb fertilizers
112. Identify the following quantities as scalar or vector respectively: mass of an object, the number of leaves on a tree, and wind velocity.
A. Scalar, Scalar, Vector
B. Scalar, Vector, Scalar
C. Vector, Scalar, Scalar
D. Vector, Scalar, Vector
113. Which of the following is a scalar quantity?
A. Acceleration
B. Temperature
C. Velocity
D. Weight
114. Which of the following describes a vector quantity?
A. It specifies direction only.
B. It specifies magnitude only.
C. It can be a dimensionless a vector quantity.
D. It specifies both magnitude and direction.
115. A man pushes against the wall with 25 pounds of force. The wall does not move. What is the resultant force?
A. -25 pounds
B. 0 pounds
C. 50 pounds
D. 75 pounds
116. In a coordinate system, a vector is oriented at angle with respect to the x axis. They components of the vector equals the vector’s magnitude multiplied by which trigonometric function?
A. Cos angle
B. Cot angle
C. Sin angle
D. Tan angle
117. An ant on a picnic table travels 30 cm due east, then 25 cm northward and finally 15 cm due west. What is the magnitude of the ant’s displacement relative to its point of origin?
A. 29 cm
B. 58 cm
C. 70 cm
D. 99 cm
118. What will happen to a moving object in the sum of all the forces acting on it is zero?
A. It will accelerate uniformly.
B. It will slow down and stop.
C. It will change the direction of its motion.
D. It will continue moving with constant velocity.
119. Acceleration is always in the direction of the .
A. displacement
B. final velocity
C. initial velocity
D. net force
120. A brick slides on the horizontal surface. Which of the following will increase the magnitude of the frictional force on it?
A. Putting a second brick on top
B. Decreasing the mass of the brick
C. Increasing the surface area of contact
D. Decreasing the surface area of contact
121. The potential energy of a body at a certain height is 100 J. The kinetic energy possessed by it when it just touches the surface of the earth is .
A. greater than the potential energy
B. less than the potential energy
C. equal to the potential energy
D. cannot be known
122. What happens to the kinetic energy of an object if tit’s speed is doubled?
A. It will be halved.
B. It will be doubled.
C. It will be tripled.
D. It will be quadrupled.
123. What is the type of energy possessed by a simple pendulum when it is at the mean position?
A. Kinetic energy
B. Mechanical energy
C. Potential energy
D. Sound energy
124. A ball is thrown upward into the air with a speed that is greater than terminal speed. On the way up, it slows down and after its speed equal the terminal speed but before it gets to the trajectory .
A. it speed up
B. its speed is constant
C. it continues to the slow down
D. its motion becomes jerky
125. When a bullet is fired from a riffle, the force in the riffle is equal to the force on the bullet. Why is it that the energy of the bullet is greater than the energy of the recoiling rifle?
A. Because there is more impulse on the bullet
B. Because the force on the bullet acts for a longer time
C. Because the force on the bullet acts for the longer distance
D. Because the bullet’s momentum is greater than that of the rifle
126. Car A has a mass of 1000 kg and the speed of 60 kph while car B has a mass of 200 kg running at a speed of 30 kph. What is the kinetic energy of car A?
A. Half that of car B
B. Equal that of car B
C. Twice that of car B
D. Four times that of car B
127. An object is thrown straight up. Which of the following is TRUE about the sign of work done by the gravitational force while the object moves up and down?
A. Work is zero on the way up, work is zero on the way down.
B. Work is negative on the way up, work is negative on the way down.
C. Work is negative on the way up, work is positive on the way down.
D. Work is positive in the way up, work is negative on the way down.
128. What happens to the kinetic energy of a moving object if the net work done is positive?
A. The kinetic energy remains the same.
B. The kinetic energy increases.
C. The kinetic energy decreases.
D. The kinetic energy is zero.
129. Object A with a mass of 4 kg is lifted vertically 3 m from the ground, object B with a mass of 2 kg is lifted 6 m up. Which of the following statement/s is/are TRUE?
I. Object A has greater potential energy since it is heavier.
II. Object B has greater potential energy since it is lifted to a higher position.
III. Two objects have the same potential energy.
A. I only
B. II only
C. III only
D. not enough information given
130. According to the scientific definition of work, pushing a table accomplishes no work unless there is .
A. an opposing force
B. a net force greater than zero
C. an applied force greater than its weight
D. movement in the same direction as the force
131. A machine does 2 500 J of work in one minute. What is the power developed by the machine?
A. 21 W
B. 42W
C. 2 500 W
D. 150 000 W
132. To which type of simple machine does a pencil sharpener belong?
A. Inclined plane
B. Lever
C. Pulley
D. Wheel and axel
133. Which of Newton’s law best explains why motorists should always wear seat belts?
A. Law of Inertia
B. Law of Acceleration
C. Law of Interaction
D. Law of Gravitation
134. The same net force is applied to object 1 and object 2. The observed acceleration of the two objects are not the same; object 1 has acceleration three times that of object 2. Which of the following is correct?
A. Object 1 has more friction than object 2.
B. Object 1 has one-third the mass of object 2.
C. Object 1 has three times the mass of object 2.
D. Object 1 has a different, less streamlined shaped than object 2.
135. The law of inertia applies to .
A. moving objects
B. objects that are not moving
C. both moving and non-moving objects
D. none of these
136. Which statement is CORRECT about the Law of Conversation of Energy?
A. The total amount of energy is constant.
B. Energy cannot be used faster than it is created.
C. The supply of energy is limited so we must conserve.
D. Energy must be conserved and you are breaking a law if you waste energy.
137. Which of the following can transform electrical energy to mechanical energy?
A. Electric bulb
B. Electric fan
C. Loud speaker
D. Television
138. Celso is making a picture frame. He sticks a nail into a piece of wood and hits the nail with a hammer. Which form of energy is NOT released when the hammer hits the nail?
A. Chemical
B. Kinetic
C. Sound
D. Thermal
139. Butch throws a baseball into the air. It rises, stops when it reaches its greatest height, and the falls back to the ground. At what point is kinetic energy initially converted to potential energy?
A. When the baseball is rising
B. When the baseball is falling
C. Just after the baseball hits the ground
D. While the baseball is stopped in the air
140. Which energy conversation takes place when a toaster is switched on?
A. Chemical to sound
B. Chemical to thermal
C. Electrical to sound
D. Electrical to thermal
141. When coal is burned to produce electricity, the electrical energy produced is less than the potential energy of the coal. Which BEST explains this observation?
A. The amount energy in the coal is not known.
B. As the coil is heated, the molecules move so fast that they are destroyed.
C. Some of the potential energy in the coal is converted into forms of energy other than electricity.
D. Some of the potential energy in the coal requires more intense heat so that can be compared to electricity.
142. What is the TRUE of all combinations of resistors arranged in parallel?
I. Current spilts down each leg of the combination.
II. Voltage is constant across each leg of the combination. III.Resistance is the same for each leg of the combination.
A. I and II only
B. I and II only
C. II and II only
D. I, II and III
143. What is the closed, continuous path through which electrons can flow?
A. Charge
B. Circuit
C. Resistor
D. Voltage
144. What will be your charge if you scrape electrons from your feet while scuffing across the rug?
A. Negative
B. Neutral
C. Positive
D. Not enough information given
145. How will you force charge if the distance between the two charge spheres is doubled?
A. The force is doubled.
B. The force is tripled.
C. The force is quadrupled.
D. The force is multiplied eight times.
146. A 6 ohm and 12 ohm resistors are connected in parallel with each other to a battery. Which of the following is TRUE?
A. More current will flow through the 20 ohm resistor.
B. The current flowing through the resistor is the same.
C. The resistor values must be equal for the circuit to work.
D. The potential difference across the two resistors is the same .
147. A new 1.5 V dry cell furnishes 30 A when short-circuited. Find the internal resistance of the cell.
A. 0.05 Ω
B. 0.10 Ω
C. 1.5 Ω
D. 30 Ω
148. If three identical lamps are connected in parallel to A 6 V dry cell, what is the voltage drop across each lamp?
A. 2 V
B. 3 V
C. 6 V
D. 18 V
149. Which of the following describes an electric current?
A. Regulates the movement of electric charge
B. The opposition material offers to the electron flow
C. The electric pressure that causes charged particles to flow
D. The movement of charged particles in the specific direction
150. A 10 W bulb and a 20 W bulb are connected in a series circuit. Which bulb has the more current flowing in it?
A. The 10 W bulb
B. The 20 W bulb
C. Both bulbs have the same current
D. Cannot be determined
151. Which of the following are characteristics of a series circuit?
I. The current that flows through each resistance is the same as the total current throughout the circuit.
II. The sum of all the individual voltage drops in the same as the applied voltage.
III. The reciprocal of the total resistance is equal to the sum of the reciprocal of the separate resistances.
IV. The voltage drop in each resistance is the same as the magnitude of the applied voltage.
A. I and II only
B. I and III only
C. III and IV only
D. I, II, and III only
152. Which states that the sum of all potential rises and potential drops in any loop (closed circuit ) is zero?
A. Coulomb’s Law
B. Kirchoff’s Law
C. Law of Electrolysis
D. Ohm’s Law
153. A television and an electric fan are connected in parallel top a 220 V line. The current in the television is 8 A and in the electric fan is 3 A. What is the current flowing in the line?
A. 2.67 A
B. 5 A
C. 11 A
D. 24 A
154. What happens to the current if resistance increases?
A. Decreases
B. Increases
C. No change
D. Cannot be determined
155. Which of the following statement DOES NOT represent Ohm’s Law?
A. Current/potential difference =constant
B. Potential difference/current = constant
C. Potential difference = current x resistance
D. Current = resistance x potential difference
156. An iron nail can be turned into a temporary magnet if it is held in a strong magnet field. Which method of magnetization is this?
A. Charging
B. Conduction
C. Introduction
D. Saturation
157. What is the resistance of an electric bulb drawing 1.2 A current and 6.0 V?
A. 0.2 Ω
B. 0.5 Ω
C. 2 Ω
D. 5 Ω
158. What happens to the current-carrying ability of a wire as temperature increases?
A. There is no change.
B. The wire can’t carry any current.
C. The wire can carry more current.
D. The wire can carry less current.
159. A 300 W at 220 V TV set is used at an average of 4 hours a day for 30 days. If the electrical energy costs Php 1.60 per kilowatt-hour, how much is the energy cost?
A. Php 5.76
B. Php 22.50
C. Php 57.60
D. Php 225.00
160. Electromagnetic radiation can be used for wireless communications. Which of the following can be used to transmit signals such as mobile phone calls?
A. Infrared
B. Gamma
C. Microwaves
D. Radiowaves
161. Which statement about the North-magnetic pole of the Earth is TRUE?
A. Its location never changes.
B. It corresponds to the N-pole of a bar magnet.
C. It corresponds to the S-pole of a bar magnet.
D. It is at the same location as the geographic north pole of the Earth
162. An iron nail can be turned into a temporary magnet if it is held in a strong magnet field. Which method of magnetization is this?
A. Charging
B. Conduction
C. Introduction
D. Saturation
163. Which of the following factors affect the size of the induced current in a coil?
I. Number of turns in the coil
II. Size of the inducing field III.Direction of the winding in the coil
IV. Resistance of the wire in the coil
A. I and II only
B. III and IV only
C. I, II, and III only
D. I, II, and IV only
164. To use the right hand rule to predict the direction of n induced current in a coil, your thumb must point .
A. to the direction of the motion of the wire
B. to the S-pole of the induced magnetic field
C. in the direction of the induced current
D. in the direction of the inducing field
165. When a bar magnet is inserted into a coil, a current of 12.0 A is induced in the coil. If four magnets of the same type are inserted into a coil at the same time, what would be the induced current?
A. 3 A
B. 4 A
C. 12 A
D. 48 A
166. Which of the following involves adsorption?
A. Plating the copper on a steel object
B. Adherence of paint to wood surfaces
C. Brown color of the eyes of the Filipinos
D. Remobal of odor inside a refrigerator using charcoal
167. Which of the following BEST describes temperature?
A. Temperature measures the total energy in something.
B. Temperature measures the kinetic energy in substance.
C. Temperature measures the total kinetic energy contained in an object.
D. Temperature measures the average molecular kinetic energy in substance.
168. What is the direction of a magnetic field within a magnet?
A. From north to south
B. From south to north
C. Front to back
D. Back to front
169. Which is the induced voltage across a stationary conductor in a stationary magnetic field?
A. Decreased
B. Increased
C. Zero
D. Reversed in polarity
170. What is the magneto motive force (mmf) of a wire with 8 turns carrying 3 A of current?
A. 2. 67
B. 24
C. 240
D. 2400
171. A coil of wire is placed in a charging magnet field. If the number of turns in the coil is decreased, what will happen to the voltage induced across the coil?
A. Remain constant
B. Be excessive
C. Decrease
D. Increase
172. Which of the following is TRUE about the frequency and velocity of electromagnetic waves?
A. Frequency and wavelength are interdependent of each other
B. As frequency increases, wavelength decreases
C. As frequency increases, wavelength increases
D. Frequency is constant for all wavelengths
173. Which of the following correctly lists electromagnetic waves in order form longest to shortest wave length?
A. Television, infrared, visible light, X-rays
B. Gamma rays, ultraviolet, infrared, microwaves
C. Radio waves, infrared, gamma rays, ultraviolet
D. Micro waves, ultraviolet, visible light, gamma rays
174. An electromagnetic wave is radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna?
A. Diagonally
B. Vertically
C. Horizontally and in a direction parallel to the wave’s direction of motion
D. Horizontally and in a direction perpendicular to the wave’s direction of motion
175. What should a good diode tested with an ohmmeter indicate?
A. High resistance when forward or reverse biased
B. Low resistance when forward or reverse biased
C. High resistance when reverse biased and low resistance when forward biased
D. High resistance when forward biased and low resistance when forward biased
176. Vacuum tubes in a radio transmitter are used to .
A. record programs
B. provide DC supply
C. generate high power radio waves
D. provide lighting inside the studio
177. Which material is the usual component of an anode?
A. Aluminum
B. Carbon
C. Copper
D. Nickel
178. A metal spoon is placed in a cup filled with hot coffee. After sometime, the exposed end of the spoon becomes hot even without a direct contact with the liquid. What explains this phenomenon?
A. Conduction
B. Convection
C. Radiation
D. Thermal expansion
179. Which cause the warmth that you fell when you place your finger at the side of the flame of a burning candle?
A. Conduction
B. Convection
C. Radiation
D. Not enough information given
180. Which process of heat transfer happens by the movement of mass from one place to another?
A. Conduction
B. Convection
C. Induction
D. Radiation
181. When work is done by a system, what happens to its temperature assuming that no heat is added to it?
A. Decreases
B. Increases
C. Remains the same
D. None of these
182. Which states that “when two systems are in thermal equilibrium with a third system, then they are in thermal equilibrium with each other?
A. Zeroth Law of Thermodynamics
B. First Law of Thermodynamics
C. Second Law of Thermodynamics
D. Mechanical Equivalent of Heat
183. What happens in an adiabatic process?
A. No heat enters or leaves the system.
B. The pressure of the system remains constant.
C. The temperature of the system remains constant.
D. The system does no work nor work is done on it.
184. What thermodynamic process is involved in a closed car inside a hot garage?
A. Adiabatic
B. Isobaric
C. Isochoric
D. Isothermal
185. Consider the thermal energy transfer during a chemical process. When heat is transferred to the system, the process is said to be and the sign of H is .
A. endothermic, positive
B. endothermic, negative
C. exothermic, positive
D. exothermic, negative
186. Which of the following statements is FALSE?
A. Entropy increases with the number of microstates of the system.
B. Any irreversible process results in an overall increase in entropy.
C. The total entropy of the universe in any spontaneous process.
D. The change in entropy in a system depends on the initial and final states of the system and the path taken from one state to the order.
187. During a refrigeration cycle, heat is rejected by the refrigerant in .
A. compressor
B. condenser
C. evaporator
D. expansion valve
188. Which of the following CORRECTLY describes a refrigeration system?
A. Rejects energy to a low temperature body.
B. Rejects energy to a high temperature body.
C. Removes heat from a low temperature body and delivers it to a high temperature body.
D. Removes heat from a high temperature body and delivers it to a low temperature body.
189. Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?
A. Ammonia
B. Carbon dioxide
C. Fluorine
D. Sulfur dioxide
190. Which phenomenon is BEST explains by the particle nature of light?
A. Doppler effect
B. Interference
C. Photoelectric effect
D. Polarization
191. According to the quantum theory of light, the energy of light is carried in discrete unit called .
A. alpha particles
B. photoelectrons
C. photons
D. protons
192. Ruther ford observed that most of the alpha particles directed at a metallic foil appear to pass through unhindered, with only a few deflected at large angles. What did he conclude?
A. Atoms can easily absorb and re-emit alpha particles
B. Atoms consist mainly of empty space and have small, dense nuclei.
C. Alpha particles behave like waves when they interact with atom.
D. Atoms have most of their mass distributed loosely in an electron cloud.
193. When an electron change from a higher energy to a lower energy state within an atom, a quantum of energy is .
A. absorbed
B. emitted
C. fissioned
D. fused
194. When does nuclear fission occur?
A. When we cut nuclei into two with a very small cutting device
B. When one nucleus bumps into another causing a chain reaction
C. When a nucleus divides spontaneously, with no apparent reason
D. When electrical force inside a nucleus overpower forces
195. When does nuclear fusion release energy?
A. When uranium emits a neutron
B. When heavy ions fuse together
C. When very light nuclei fuse together
D. When uranium spits into two fragments
196. Albert Einstein’s Second postulate of Special Relativity state that the speed of light .
A. can decrease if the speed of the observer decreases
B. can increase if the speed of the observer increases
C. randomly changes depending upon its original light source
D. is constant regardless of the speed of the observer or the light source
197. A passenger train travels east at high speed. One passenger is located at the east side of one car, another is located at the west side of that car. In the train’s frame, these two passengers glance up the same time. In the earth’s frame .
A. they glance up simultaneously
B. the passengers glance sideways
C. the passenger at the east side glances up first
D. the passenger at the west side glances up first
198. Benie11 travels at high speed from Earth to the star Alpha Centauri which four light years away. Which one is CORRECT in Benie11’s frame?
A. The clocks on earth and on Alpha Centauri are synchronized.
B. The trip takes more time than it does in the earth’s frame
C. Benie11 travels to Alpha Centauri over a length that is shorter than four light years.
D. Alpha Centauri travels to Benie11 over a length that is shorter than four light years.
199. One clock is placed on top of a mountain and another clock is at the bottom the mountain. Ignore the rotation of the earth. Which clock ticks more slowly?
A. They tick at the same rate.
B. The one on top of the mountain.
C. The one at the bottom of the mountain.
D. Cannot be determined.
200. You are in a windowless spacecraft. What do you need to do determine whether your space ship is moving at constant non-zero velocity, or is at rest, in an inertial frame of earth?
A. Make very precise time measurements.
B. Make very precise mass measurements.
C. Make very precise length and time measurements.
D. Nothing, because you cannot succeed no matter what you do.
201. According to the effects of length contraction, from the viewpoint of an observer stationary with respect to a body moving at a uniform speed relative to the observer, which one is CORRECT?
A. The body contracts along the direction of the motion.
B. The time it takes for a clock incorporated in the body to tick contracts.
C. The body is not now contracted but would contract if it were accelerate.
D. The body contracts in some direction traverse to the direction of motion.
202. April and May are identical twins. One day, April embarked on a high-speed space travel into a distance star. When he gets back home, who is older between the two?
A. April
B. May
C. None of them because they are still of the same age
D. Cannot be determined
203. An accelerated frame is a non-inertial frame. Is this TRUE?
A. True
B. False
C. Sometimes true, sometimes false
D. Not enough information given
204. What is the rest energy of a single proton which has a rest mass of 1.67 x 10 -27kg?
A. 1.50 x 10 J
B. 1.50 x 101 J
C. 1.50 x 10-10J
D. 1.50 x 10-10J
205. Which of the following statements is TRUE about the speed of light?
A. The speed of light has a value that depends on the observer’s frame of reference.
B. The speed of light has the same value for observers in all reference frames.
C. The speed of light is constant in an inertial frame of reference.
D. The speed of light is slower in a moving frame of reference.
206. A person is riding a moped that is travelling at 20 m/s. What is the speed of the ball if the moped rider throws a ball forward at 4 m/s while riding the moped?
A. 16 m/s
B. 20 m/s
C. 24 m/s
D. 80 m/s
207. According to Einstein, what is considered the fourth dimension?
A. Curled dimension
B. Horizontal dimension
C. Space dimension
D. Time dimension
208. As you observe a fish inside an aquarium, the fish appears to be bigger when underwater. When observed through the side, the fish seems closer than if you observe over the top. When you look through the corner, it appears to be that there are two fishes. What explains this observation?
A. Diffraction
B. Interference
C. Reflection
D. Refraction
209. What is the phenomenon by which the accident light falling on a surface is back into the same medium?
A. Absorption
B. Polarization
C. Reflection
D. Refraction
210. Which property is responsible for alternating light and dark bonds when light passes through two or more narrow slits?
A. Diffraction
B. Interference
C. Polarization
D. Refraction
211. What happens when a light wave enters into a medium of different optical density?
A. Its speed and frequency change.
B. Its speed and wavelength change.
C. Its frequency and wavelength change.
D. Its speed, frequency and wavelength change.
212. If carbon tetrachloride has an index of refraction of 1.461, what is the speed of light through this liquid? (c= 3.00 x 108 m/s)
A. 1.46 x 108 m/s
B. 2.05 x 108 m/s
C. 4.38 x 108 m/s
D. 4.46 x 108 m/s
213. A ray of light in air is incident of an air-to-glass boundary at an angle of 36 degrees with the normal. If the index of refraction of the glass is 1.65, what is the angle of the refracted ray within the glass with respect to the normal?
A. 18 degrees
B. 30 degrees
C. 46 degree
D. 56 degrees
214. If the critical angle for internal reflection inside a certain transparent material is found 48 degrees, what is the index of refraction of the material? ( air is outside the material )
A. 0.74
B. 1.35
C. 1. 48
D. 1.53
215. According to the law of reflection, from what angle is light coming after it is reflected from a mirror?
A. The same angle as the incident ray as measured from the surface of the mirror
B. The same angle as the incident ray as measured from the normal to the mirror
C. Some light comes directly from the object and some passes through the mirror
D. Cannot be determined
216. Two planed mirror are positioned perpendicular to each other. A ray of rad light incident on mirror at an angle of 55ᵒ . This ray is reflected from mirror 1 and then strikes 2 and is reflected again. The angle of reflection will be .
A. 35ᵒ
B. 45ᵒ
C. 55ᵒ
D. 70ᵒ
217. A point object is placed in front of a plane mirror. Which is the correct location of the image by the mirror?
A. A
B. B
C. C
D. D
218. Which of the following is the BEST description of a white light?
A. It is a mixture of every color.
B. It is a mixture of seven color.
C. It is a mixture of red, blue and yellow.
D. It is a pure color that cannot be broken up.
219. Which of the following observation is NOT true whenever a system is in chemical equilibrium?
A. Attainment of equilibrium requires time.
B. The rates of opposing reactions are equal.
C. The products do not change back to reactants.
D. Concentration remain constant at equilibrium even though the opposing reactions are continuing.
220. Sunsets often appears to have a more reddish-orange color than noon. Which of the following phenomenon is responsible for this effect?
A. Rayleigh Scattering
B. Dispersion
C. Polarization
D. Refraction
221. The polarization behavior of light is BEST explained by considering light to be .
A. particles
B. transverse waves
C. longitudinal waves
D. unpolarized
222. Which type of light is vibrates in a variety of planes?
A. Electromagnetic
B. Polarized
C. Transverse
D. Unpolarized
223. Light is passed through a filter whose transmission axis is aligned horizontally. It then passes through a second filter whose transmission axis is aligned vertically. What will happen to the light after passing through both filters?
A. It will be polarized
B. It will be un polarized
C. It will be entirely blocked.
D. It will return to its original state.
224. Light rays enter a material and scatter. Which BEST describes what happens to the light rays.
A. Bounce straight back
B. Move straight through
C. Spread out in all direction
D. Move through but in a new direction
225. The energy generated by the suns travels to Earth as electromagnetic waves of varying lengths. Which statement correctly describes an electromagnetic wave with a long wavelength?
A. It has a high frequency and low energy.
B. It has a high frequency and high energy.
C. It has a low frequency and can travel through a vacuum.
D. It has a low frequency and needs a medium to travel through.
226. Why is the sky blue?
A. It reflects the color of the ocean
B. The color of the outer space is blue.
C. Blue light is more readily scattered than red light by nitrogen.
D. Red light is scatted more easily than blue light by dust particles.
227. What human activity has added the most carbon in the atmosphere?
A. Burning fossils fuels
B. Mining fossil fuel
C. Increasing soil erosion
D. Cutting down the rainforests
228. Which of the following BEST describes the image for a thin diverging lens that forms whenever the magnitude of the object distance is less than that of the lens’ focal length?
A. Inverted, reduced, and real
B. Inverted, enlarged, and real
C. Upright, reduced, and virtual
D. Upright, enlarged and virtual
229. Acid rain is formed when sulfur oxides react with water in air. It causes lakes and streams decrease in pH which makes it unable to support fish and plant life. Which is the LEAST means of solving this problem?
A. Limestone may be added to the water basins.
B. Neutralize sulfur oxides with basic compounds.
C. Reduction of sulfur emissions from the industrial establishments.
D. Providing absorbent colloidal materials to screen acid rain before hitting the water.
230. Which of the following would decrease the rate in which a solid dissolves in a liquid?
A. Supersaturating the solution
B. Applying pressure into the solution
C. Grinding the solid into smaller pieces
D. Increasing the temperature of an exothermic reaction
231. Which factors affects the rate of dissolution when powdered sugar dissolves more rapidly than granulated sugar?
A. Application of heat
B. Nature of solute
C. Particle size
D. Stirring
232. What is the physical evidence that the core is composed mostly in iron?
A. Volcanoes regularly erupt material from the core to the surface.
B. Scientist have sampled the core and determined its composition.
C. The known mass of Earth requires material of high density at the core.
D. A and B
233. Which of the following comprised the largest portion of Earth’s volume?
A. Crust
B. Inner core
C. Mantle
D. Outer core
234. Which of the following statements about the Mohorovicic discontinuity is False?
A. The Moho separates the crust from the mantle.
B. The Moho marks the top of a partially molten layer.
C. The Moho separates denser rocks below from less dense rocks above.
D. Seismic wave speeds up as they pass across the Moho heading downward.
235. Where do P waves travel fastest?
A. Upper mantle
B. Lower mantle
C. Outer core
D. Inner core
236. What is the driving force for the movement of the lithospheric plates?
A. Heat from the sun
B. Heat in the atmosphere
C. Unequal distribution of heat within the Earth
D. Unequal distribution of heat in the oceans
237. Which evidence supports Alfred Wegener’s Continental Drift Theory?
A. Major rivers on different continents match
B. Land bridge still exist that connect major continents
C. The same magnetic direction exist on different continents
D. Fossils of the same organism have been found on different continents
238. Which of the following is TRUE based on the Plate Tectonics Theory?
A. The asthenosphere is strong and rigid.
B. The lithosphere is divided into plates.
C. The asthenosphere is divided into plates.
D. The asthenosphere moves over the lithosphere.
239. What type of boundary occurs where two plates move together, causing one plate to descend into the mantle beneath the outer plate?
A. Convergent boundary
B. Divergent boundary
C. Transform fault boundary
D. Transitional boundary
240. Which are considered as most destructive earthquake waves?
A. P waves
B. Q waves
C. S Waves
D. Surface waves
241. Which of the following conditions rather than faulting
A. Low temperatures and low confining pressures
B. Low temperatures and high confining pressures
C. High temperatures and low confining pressures
D. High temperatures and high confining pressures
242. In which of the following climates will chemical weathering be most rapid?
A. Hot and dry
B. Cold and dry
C. Hot and humid
D. Cold and humid
243. Which of the following statements about weathering is false?
A. Rock of different composition weather at different rates.
B. Heat and heavy rainfall increase the rate of chemical weathering.
C. The presence of soil slows down the weathering of the underlying bedrock.
D. The longer a rock is exposed at the surface, the more weathered becomes.
244. Why do agricultural areas often experience the greatest amount of soil erosion?
A. Because farms are typically located near streams
B. Because farmers usually remove trees from their fields
C. Because they typically occur in areas of moderately steep slopes
D. Because farming usually involves plowing the soil to plant seeds
245. What can happen to global temperatures for several years after a volcanic eruption.
A. Temperatures may increase
B. Temperatures may decrease
C. Temperatures can create more volcanoes
D. Temperatures are not affected by volcanic eruptions
246. Which of the following correctly describe diastrophism?
A. It refers to the boundaries between crustal plates.
B. It refers to a discredited theory of continent formation.
C. It refers to all process in which magma moves from Earth’s surface to or near the surface.
D. It refers to all the deformation of Earth’s crust by bending or breaking in response to great pressures exerted either from below or from within the crust.
247. What is the evaporation of water from plant surface especially through stomates?
A. Condensation
B. Perpiration
C. Respiration
D. Transpiration
248. Which of the following processes form clouds?
A. Condensation
B. Evaporation
C. Precipitation
D. Transpiration
249. Which of the following is/are a natural factors that may disrupt the water cycle?
A. Water pollution
B. Drying of ground water
C. Mismanaged domestic and industrial use of water
D. Both A and C
250. Fresh water is an integral part of hydrologic cycle. How is it produced?
A. Condensation
B. Desalination
C. Evaporation
D. Transpiration
251. Fresh water is an integral part of hydrologic cycle. How is it produced?
A. Condensation
B. Desalination
C. Evaporation
D. Transpiration
252. Which of the following is included in the term hydrosphere?
A. All the water on the planet.
B. All the freshwater on the planet.
C. All water on the surface of the continents.
D. All the liquid water on the Earth, minus ice.
253. What is the main difference between swamps and marshes?
A. Trees versus grassland
B. High water table versus low
C. Salt water versus fresh water
D. Seasonality of precipitation
254. Alake will become saline if .
A. lake levels decrease
B. precipitation exceeds evaporation
C. evaporation exceeds precipitation
D. the lake has no natural drainage outlet
255. What is the other name of typhoon?
A. Low pressure area
B. Hurricane
C. Tornado
D. Twister
256. What is the difference among typhoon, a hurricane, and a cyclone?
A. While typhoons are strong storms, cyclones are worse, and hurricanes are the strongest of all.
B. Hurricanes spin clockwise, cyclone spin counter clockwise, and typhoons are actually tidal waves.
C. Typhoons are found near the equator, hurricanes in the midlatitudes ad typhoons in the arctic and antartic.
D. The storms are the same but the manes are used in the Western Pacific North America and Indian Ocean, respectively.
257. Which one of these revolving weather is the smallest?
A. Hurricane
B. Tornado
C. Tropical Cyclone
D. Typhoon
258. What happens when the rate of evaporation equals the rate of condensation?
A. Clouds form.
B. Precipitation occurs.
C. The humidity decreases.
D. The dew point is reached.
259. Which is the cause of change of seasons?
A. The rotation of the Earth
B. The tilt Earth’s axis
C. The rain-shadow effect
D. The sizes and shapes of land surface features
260. What causes changes in weather?
A. Cloud formation
B. Water evaporation
C. Air humidity
D. Air masses interaction
261. What part of the atmosphere protects Earth’s surface from harmful ultraviolet radiation?
A. Exosphere
B. Mesosphere
C. Stratosphere
D. Troposphere
262. The aurora borealis and aurora australis are caused by interaction between charged particles and Earth’s magnetic field. What layer of Earth’s atmosphere contain these particles?
A. Exosphere
B. Mesosphere
C. Ozonosphere
D. Thermosphere
263. Which is a deep layer of electrically charged molecules and atoms that reflects radio waves?
A. Exosphere
B. Ionosphere
C. Radiosphere
D. Troposphere
264. The Earth completes one revolution around the sun in 365 days. Compared the earth, how long does it take Mercury to complete one revolution?
A. Less than the Earth
B. Greater than the Earth
C. The same as the Earth
D. Cannot be determined
265. What two properties of stars are being directly compared in the Hertzsprung- Russel Diagram?
I. Size
II. Temperature
III. Luminuosity
IV. Density
A. I and II
B. II and III
C. III and IV
D. I and IV
266. How is the atmospheric pressure of Mars when compared to the atmospheric pressure of the Earth?
A. Half as much as that of the Earth
B. About the same as the Earth
C. About 1/100th that of the Earth
D. About 100 times as great as the Earth
267. Which of the following statements is TRUE for both Saturn and Jupiter?
A. Both rotate faster than the Earth.
B. Both rotate slower than the Earth.
C. Only one rotates rapidly while the rotates very slowly.
D. Their periods of rotation are linked to their period of revolution.
268. According to Kepler’s Law, what is the shape of all orbits of the planets?
A. Ellipse
b. Hyperbola
C. Oblate spheroid
D. Parabola
269. What is the first successful space rotation program that tested the ability of astronauts to work for long periods and studied their body responses to weightless condition?
A. Apollo 11
B. Sputnik I
C. Salyut
D. US Skylab
270. The universe is estimated to be between ten and twenty billion years old. This estimate is based on the value of which constants?
A. Speed of light
B. Hubble constant
C. Mass of the Earth
D. Mass of the electron
271. On which of the following planets would the sun rise in the west?
A. Mars
B. Jupiter
C. Saturn
D. Venus
272. Which of the following describes an albedo?
A. Brightness of the star
B. Phase changes of a planet
C. Wobbling motion of a planet
D. Amount of light a planet reflects
273. Where are most asteroids located?
A. Between Earth and Mars
B. Between Mars and Venus
C. Between Mars and Jupiter
D. Between Jupiter and Saturn
274. Which refers to the precision of the Earth?
A. Change night to day
B. Earth’ motion around the sun
C. Effect of the moon on the Earth’s orbit
D. Change in orientation of the Earth’s axis
275. What kind of eclipse do we see when the moon is entirely within the Earth’s umbra shadow?
A. Total solar
B. Total lunar
C. Partial solar
D. Partial lunar
276. At which phase of the moon do solar eclipses occur?
A. Full moon
B. First quarter
c. New moon
D. Third quarter
277. If lunar eclipse occurs tonight, when is the soonest that a solar eclipse can occur?
A. Tomorrow
B. In two weeks
C. In one month
D. In one year
278. Which one is considered as one of the most important results of the Apollo missions to the moon?
A. Discovery of subsurface of water
B. Determination of the age of moon rocks
C. First observations of surface features called craters
D. Proof that craters were produced by volcanic eruptions
279. What is the problem experienced by astronauts staying for long periods of time aboard the international space station?
A. Weight loss due to diet
B. Determined of the age of moon rocks
C. Muscle loss due to lack of exercise
D. Effects of lower gravity on the body
280. NASA development a filtration process to make waste water on space flights renewable. Where might this filtration process be used on Earth?
A. In areas where water is salty
B. In areas where water is contaminated
C. In areas where water is used for recreation
D. In areas where water contains hard minerals
Physical Science Part 8
281. What must be done in order to preserve the biosphere for future generations?
A. Put all wild animals and game preserves.
B. Make use of technology to develop.
C. Explore ways to drain and fill wetlands along the sea coast.
D. Understand how living things interact with their environment.
282. Which of the following can help ensure a suitable environment for the future generations?
A. Biological controls
B. Chemical dumps
C. Fossils fuels
D. Pesticides
283. Which human activity would be more likely to have a negative impact on the environment?
A. Investigating the use of the biological controls for the pests
B. Using reforestation and cover cropping to control soil erosion
C. Using insecticides to kill insects that compete with human for food
D. Developing a research aimed toward the preservation of endangered species
284. Which is the main cause of the depletion of the ozone layer?
A. Decrease in temperature
B. Decrease in the amount of air pollutants
C. Increase in number of marine ecosystem
D. Increase in temperature due to atmospheric pollutants
285. DDT was used to kill mosquitoes. It was observed that lizards that ate the mosquitoes slowed down and died. Eventually, the pollution of cats that eat lizards diminished. What can be inferred from this situation?
A. DDT can cause harm to all organisms.
B. Using DDT is a reliable way to eliminate insect predators.
C. The mosquito and other organisms were all competing for same resources.
D. Environmental changes that affect one population can affect other population.
286. Butch is a seasoned farmer updated a new trends in agriculture. In effort to make and harvest the best rice crops, he tried to implement the environmentalist’s way of controlling pests as mandated in the integrated pest management. Butch later found out that all of the following processes made best contributions to a good and safe harvest EXCEPT .
A. use of natural enemies
B. planting variety of crops
C. use of narrow-spectrum pesticides
D. use of genetically engineered crops
287. What is the most important factor for the success of animal population?
A. Adaptability
B. Interspecies activity
C. Natality
D. Unlimited food
288. Why dues starvation occur?
A. There is not enough fertile land worldwide on which to grow food.
B. Forces in nature (drought, pests, floods ) wipe out food supplies.
C. Population is growing at a faster rate than the world’s ability to produce.
D. Some parts of the world lack food while other parts of the world produce more than they consume.
289. Which of the following presents the greatest threat to the survival of numerous plant and animal species?
A. Greenhouse effect
B. Continued burning of fossil fuel
C. Disappearance of world’s rainforest
D. Dumping of toxic waste in the least industrialized nations
290. Which factors BEST explains why the human population has grown so rapidly over the last 1000 years?
A. Humans have decreased their reliance on natural resources.
B. Humans have increased the amount of resources available on Earth.
C. Humans have increased the carrying capacity of the biosphere for the population.
D. Humans have developed physical characteristics that increase their competitive advantage.
291. Which human activity causes maximum environmental pollution having regional and global impact?
A. Agriculture
B. Industrialization
C. Mining
D. Urbanization
292. Which of the following statement in relation to sustainable development is FALSE?
A. Sustainability has the main objective of purely focusing on the natural environment.
B. Sustainable development of various countries and the entire world is the only solution left with mankind to survive for a longer period on Earth.
C. Sustainable development not only considers the protection of the environment but also the maintenance of economic viability as well as social and ethical considerations.
D. Sustainable development is defined as the development that meets the needs of present without compromising the ability of our future generation to meet their own needs.
293. What is the process of converting nitrate to nitrogen gas and nitrous oxide?
A. Ammonification
B. Denitrification
C. Nitrogen fixation
D. Transpiration
294. Which of the following chemicals enters living organism primarily from the atmosphere rather than from rocks or soil?
A. Calcium
B. Carbon
C. Sodium
D. Sulfur
295. What is the conversation of atmospheric free nitrogen gas to ammonia which occurs through the activities of certain bacteria and cyanobacteria?
A. Denitrification
B. Nitrification
C. Nitrogen fixation
D. Oxidation
296. How do animals get the nitrogen they need?
A. Directly from bacteria in the soil
B. From the process of denitrification
C. By breathing in atmospheric nitrogen
D. By consuming plants or other animals
297. The following are ways by which phosphorous enters the environment EXCEPT .
A. Run off
B. Animal waste
C. Erosion of rocks
D. Photosynthesis in plants
298. Because of biogeochemical cycling?
A. nutrients are circulated through the biosphere.
B. the Earth creates new chemicals that replace those that were used up by organisms.
C. organisms eventually run out of needed elements, compounds and other form of matter.
D. human activity has no effect on elements, chemical compounds, and other form of matter
299. Which of the biogeochemical cycles can impact all of the other directly?
A. Carbon cycle
B. Hydrologic cycle
C. Nitrogen cycle
D. Phosphorous cycle
300. What human activity has added the most carbon in the atmosphere?
A. Burning fossils fuels
B. Mining fossil fuel
C. Increasing soil erosion
D. Cutting down the rainforests
ANSWER KEY:
- B
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1. Which refers to the recorded observations and measurements in an explanation?
A. Conclusion
B. Data
C. Graph
D. Variables
2. How is hypothesis tested?
A. By gathering enough information about the problem
B. By making inferences
C. By conducting experiment
D. By formulating conclusion
3. Which summarizes a natural occurrence that may be constantly observed given the same conditions which may be expressed in words or in mathematical form?
A. Conclusion
B. Hypothesis
C. Law
D. Theory
4. Ruben prepares a solution by putting a pinch of orange crystals to water in a beaker, then by consistent stirring, the crystal dissolve. Which of the statements above are likely to be observed by Ruben?
I. The water becomes orange.
II. The color of the solution becomes darker.
III. Crystals disappear from the bottom of the beaker.
IV. The beaker and its contents become heavier as attiring continues.
A. I and II only
B. III and IV only
C. I, II, and III only
D. I, II, and IV only
5. Which of the following is NOT true about scientific method?
A. Conclusion is the last step
B. Scientific method may be applied in every life.
C. Scientific method is a systematic way of solving problem.
D. Scientific method is done by following a step-by-step procedure in an exact sequence.
6. Which apparatus will you use to measure the mass of an irregular solid correctly?
A. Empty beaker
B. Erlenmeyer flash
C. Graduated cylinder with water
D. Vernier caliper
7. To graph the distance covered and velocity of a car, which is the dependent variable? Where should be it plotted on a line graph?
A. Distance, x axis
B. Distance, y-axis
C. Velocity, x-axis
D. Velocity, y-axis
8. A student found a piece of metal. What can the student to do quickly determine if the metal might contain iron?
A. Heat the metal
B. Weight the metal
C. Place the metal in water
D. Place the metal near the magnet
9. A student dipped a strip of aluminum and a strip of iron in water. The student then exposed the strips to air for one week. Which was most likely observed one week later?
A. The iron strip formed rust.
B. The aluminum strip formed rust.
C. Both of the metal strips formed rust.
D. Neither of the metal formed rust.
10. What human activity has added the most carbon in the atmosphere?
A. Burning fossils fuels
B. Mining fossil fuel
C. Increasing soil erosion
D. Cutting down the rain forests
11. The Table below lists measurements tasks included in laboratory activities conducted by students in a Grade 9 science class. Which matches a measurement task with the correct measurement tools?
A. I
B. II
C. III
D. IV
12. Aubrey wants to track her summative tests scores over the course of the first grading period. Which of the following will BEST allow her to analyze her progress?
A. Bar graph
B. Line graph
C. Pie graph
D. Scatter graph
13. What will most likely occur if global warming will not be addressed?
A. Lower se levels
B. Melting of ice cups
C. More pollution in water
D. More reflected sunlight off the ice pack
14. How is the relationship described when both quantities are increasing but one quantity increases faster than the other.
A. Direct proportion
B. Direct square proportion
C. Inverse proportion
D. Inverse square proportion
15. In your attempt to determine which is denser oil or water, you mixed 25 ml of oil with 25ml of water. What helpful qualitative data can you derive from the set-up?
A. There are 50 ml of liquid in the container.
B. Oil did not mix with water.
C. Oil is on top of the water.
D. There are 25 ml of water and 25 ml of oil in the container.
16. Which of the following is a compound?
A. Cemented wall
B. Dry ice
C. Gold
D. Tincture of iodine
17. Which is most likely to change the blue litmus paper to red?
A. Ammonia in water
B. Detergent solution
C. Lime water
D. Vinegar
18. Which can be classified as homogeneous mixture?
I. Buko pie
II. Blood
III. Virgin coconut oil
IV. Mango juice
A. III only
B. I and II only
C. I, III, and IV only
D. II,III and IV only
19. Which of the following is a physical property of non-metals?
A. Malleability and ductility
B. Low tensile strength
C. High density
D. High tensile strength
20. The yellow color of a highlighter is a property.
A. chemical
B. heterogeneous
C. homogeneous
D. physical
21. An odorless and colorless matter boils at 100 ℃ and melts at 0 ℃ What inference can be drawn from this observation?
A. It is a metal.
B. It is a mixture
C. It is a non-metal.
D. It is a pure substance.
22. You want to clean a tarnished silver. Which one will you use?
A. Baking soda
B. Salt solution
C. Sugar solution
D. Vinegar
23. What will you add to your food to make it last longer?
A. Baking soda
B. Salt solution
C. Tomato
D. Vinegar
24. Why is it not advisable to drink soft drinks on an empty stomach?
A. It could lessen your appetite.
B. It could make you feel full faster.
C. It increases the acidity of your stomach.
D. It contains stimulant which causes dizziness.
25. Almost the entire mass of an atom is concentrated in the ?
A. electron
B. neutron
C. nucleus
D. proton
26. How many protons are present if an atom has a mass number of 23 and atomic number of 11?
A. 11
B. 12
C. 23
D. 44
27. Carbon-12 atom has .
A. 6 electrons, 6 protons, 6 neutrons
B. 6 electrons, 12 protons, 6 neutrons
C. 12 electrons, 6 protons, 6 neutrons
D. 16 electrons, 6 protons , 6 neutrons
28. What happens to the atomic number during a chemical reaction?
A. Changes
B. Remains the same
C. Changes the alternately
D. Changes and then is restored
29. Which of the following statements about isotopes of hydrogen is correct?
A. They have different atomic numbers.
C. They have the same number of neutrons .
B. They have the same number of protons.
D. They have different number of electrons.
30. Which of the following has 16 electrons?
A. 2713A1+3
B. 3517C1-1
C. 3216S
D. 3216S-2
31. How many protons, neutrons and electrons are there in an atom of 19779Au?
A. 79 protons, 79 electrons, and 118 neutrons
B. 79 protons, 79 electrons, and 197 neutrons
C. 197 protons, 79 electrons, and 79 neutrons
D. 79 protons, 79 electrons, and 158 neutrons
32. The electrons configuration of an atom of element R in the ground state is 1s22s22p63s23p64d9. What is the element described?
A. 8Cd
B. 35Br
C. 31Ga
D. 27Co
33. What is the shape of the molecule BeC12?
A. Linear
B. Angular
C. Trigonal planar
D. Tetrahedral
34. The generalized electron configuration of this group of element is [Noble gas] ns2ns. Identify its group and family.
A. Group VII and Family A
B. Group V and Family A
C. Group III and Family B
D. Group I and Family B
35. What is the position of 12Mg in the periodic table of elements?
A. Group I-A, Period 2
B. Group III-A, Period 2
C. Group II-A, Period 3
D. Group II-B, Period 4
36. What happens when a metal react with a nonmetal ? Usually .
A. a simple covalent bond is formed
B. a coordinate covalent bond is formed
C. positive and negative ions are formed
D. there is sharing of electrons in the outer shells of two elements
37. What bond exists in a solid that does not conduct electricity but conducts electricity when dissolved in water?
A. Coordinate covalent bond
B. Covalent bond
C. Ionic bond
D. Metallic bond
38 .Which of the following statements about a triple bond is CORRECT?
A. Compounds with triple bonds are not reactive.
B. An example of a molecule with a triple bond is C2H6.
C. Triple bond is weaker than single and double bonds.
D. Three pairs of electrons can hold two atoms together stronger than two pairs.
39. Which chemical bond will most likely exists if element A has an electron configuration of 1s22s22p3 and element B has 1s22s22p5??
A. Coordinate covalent
B. Ionic
C. Metallic
D. Polar covalent
40. X, Y, and Z represent elements of atomic numbers 9, 11, and 16. What type of bond will be performed between Y and Z?
A. Ionic bond
B. Metallic bond
C. Nonpolar covalent bond
D. Polar covalent bond
41. A week attraction between hydrogen atom in one molecule and an oxygen in other called .
A. covalent bond
B. Hydrogen bond
C. Ionic bond
D. Metallic bond
42. Which of the following substances is most likely a covalent compound ?
A. CaCO3
B. KNO3
C. SO2
D. NaOH
43. What is the element needed to bond with Na to create the most ionic bond?
A. F
B. C1
C. Br
D. I
44. The boiling point of substance A is higher than that of substance B. What does this meaning?
A. Substance A is less viscous than substance B.
B. Substance A evaporates faster than substance B.
C. Substance B has greater surface tension than substance A.
D. Substance B has weaker intermolecular forces than substance A.
45. What is the intermolecular force of attraction between the nucleus of one atom and the electrons of a nearby atom?
A. Dipole-dipole force
B. Ion-dipole force
C. London dispersion force
D. Van der Waals force
46. Which of the following has the greatest number of atom?
A. Ca(OH)2
B. A12O3
C. NaHCO3
D. C2H2
47. What does a triangle , which is placed in a chemical equation indicate?
A. Changes happened
B. Heat is applied
C. Gas is evolved
D. Precipitate
48. What would most probably be the resulting chemical formula when Mg+2and O-
2combine?
A. MgO
B. Mg2O2
C. MgO2
D. Mg4O4
49. Which of the following is an example of combustion reaction?
A. Mg+C12 > MgC12
B. CaCO3 > CaO + CO2
C. 2 C4H10 + 13 O2 > 8 CO2 + 10 H2O
D. AgNO3 + NaC1 > AgC1 + NaNO3
50. What type of chemical reaction is involved in Ca(S) + 2H2O Ca(OH)2(aq)?
A. Combination
B. Decomposition
C. Single-displacement
D. Double-displacement
51. When the fuel in a butane gas stove undergoes complete combustion, it reacts with oxygen to form carbon dioxide and water:_C4H10 + _ O2CO2+_H2O. Which set of coefficients can be BEST used in balancing the equation?
A. 1, 1, 4, 2
B. 2, 2, 4, 5
C. 2, 8, 13, 10
D. 2, 13, 8, 10
52. In oxidation-reduction, the oxidizing agents is reduced and gains electrons. The reducing agent is oxidized and loses electrons. Are the statements CORRECT?
A. Both statements are correct.
B. Both statements are false
C. First statement is true; second statement is false.
D. Second statement is true; first statement is false.
53. How many moles of iron does 25 g of Fe represent? (Fe=55.85 g)
A. 0.448 mol
B. 2.234 mol
C. 30.85 mol
D. 80.85 mol Ans: A. 0.448 mol
- (25 g) / ( 55.85 g/mol ) =0.448 mol
54. What is the mass of 5.0 mol of water? (1 mol H2O=18.02g)
A. 3.60 g
B. 13.02 g
C.23.02 g
D. 90.10 g Ans: C. 90.10 g
-(5 mol) (18.02 g/mol ) = 90.10 g
55. An analysis of salt shows that it contains 56.58 g potassium; 8.68 g carbon and
34.73 oxygen. What is the empirical formula of the substance?
A. KC2O3
B. K2CO2
C. K2CO3
D. K2C3O
56. Which of the following is NOT a principal assumption of Kinetic Molecular Theory?
A. Gas particles move rapidly.
B. Gases consists of submicroscopic particles.
C. There is very little empty space in a gas.
D. Gas particles have no attraction for one another.
57. Based on the Kinetic Molecular Theory, a gas can be compressed much more than a solid or liquid because .
A. gas particles move rapidly
B. the particles of a gas are very far apart
C. a gas is composed do not attract or repel one another
D. gas particles do not attract or repel one another
58. Which refers to the kinetic energy or motion of gas particles?
A. Pressure
B. Quantity of gas
C. Temperature
D. Volume
59. A given mass of gas has a volume of 750 ml at -25℃ and 280 torr. What would the volume of the gas be at 30 and 560 torr of pressure considering the amount of gas which is constant?
A. 450 ml
B. 458 ml
C. 480 ml
D. 520 ml
Ans: B. 458 ml
This item involves combined gas law : P1V1 = P2V2
T1 T2
60. Seven liters of an ideal gas are contained at 3.5 atm and 30 How many moles of this gas are present?
A. 0.50 mol
B. 0.75 mol
C. 1.00 mol
D. 1. 25 mol
61. What is the BEST reason why the atmospheric pressure in Baguio City is lower than the atmospheric pressure at sea level?
A. Because there are more gas particles at higher altitudes
B. Because there are less gas particles at higher altitudes
C. Because there are greater temperature at higher altitudes
D. Because there is lesser temperature at higher altitudes
62. Which of the following correctly describes the process of exhalation (air going out of the lungs)?
A. The lungs decrease in volume, causing the internal pressure to increase.
B. The lungs decrease in volume, causing the internal pressure to decrease.
C. The lungs increase in volume, causing the internal pressure to increase.
D. The lungs increase in volume, causing the internal pressure to decrease.
63. What is the closed, continuous path through which electrons can flow?
A. Charge
B. Circuit
C. Resistor
D. Voltage
64. What will be your charge if you scrape electrons from your feet while scuffing across the rug?
A. Negative
B. Neutral
C. Positive
D. Not enough information given
65. How is food cooked faster using a pressure cooker?
A. The accumulated steam increases the pressure and decreases the boiling point of the liquid.
B. The accumulated steam increases the pressure and increases the boiling point of the liquid.
C. The accumulated steam decreases the pressure and increases the boiling point of the liquid.
D. The accumulated steam decreases the pressure and decreases the boiling point of the liquid.
66. Which of the following is NOT a characteristic of a base?
A. Bitter taste
B. Slippery feeling
C. Able to change litmus from red to blue
D. Reacts with carbonates to produce carbon dioxide
67. Which of the following statements about acid and base is TRUE?
A. Baking soda is acidic.
B. Both acids and bases conduct electricity.
C. The concept of H3O+ was introduced by Arrhenius.
D. The end point is reach when the color of the indicator in titration changes.
68. What is the pH of the solution with an [H+] of 1.00 x 10-11?
A. 1
B. 3
C. 7
D. 11
69. Which of the following is the most acidic?
A. Calamansi juice
B. Carbonated drink
C. Urine
D. Vinegar
70. Acid rain is formed when sulfur oxides react with water in air. It causes lakes and streams decrease in pH which makes it unable to support fish and plant life. Which is the LEAST means of solving this problem?
A. Limestone may be added to the water basins.
B. Neutralize sulfur oxides with basic compounds.
C. Reduction of sulfur emissions from the industrial establishments.
D. Providing absorbent colloidal materials to screen acid rain before hitting the water.
71. Which of the following would decrease the rate in which a solid dissolves in a liquid?
A. Supersaturating the solution
B. Applying pressure into the solution
C. Grinding the solid into smaller pieces
D. Increasing the temperature of an exothermic reaction
72. Which factors affects the rate of dissolution when powdered sugar dissolves more rapidly than granulated sugar?
A. Application of heat
B. Nature of solute
C. Particle size
D. Stirring
73. In which factor is the description “like dissolves like” BEST used?
A. Volume
B. Pressure
C. Temperature
D. Nature of solute and solvent
74. When the production of hydrogen ions in the body is the same as their loss, you are in .
A. acid-base balance
B. electricity balance
C. water balance
D. balance diet
75. What is the mass percent of Na2SO4 in a solution made by dissolving 25 g Na2SO4 in 225 g H2O?
A. .01%
B. 1%
C. 10% D.20%
76. What is the mole fraction of 100 g ethanol (C2H6O) mixed in 100 g water?(C=12 H=1 O=16)
A. 0.28
B. 2.17
C. 5.56
D.7.73
77. What is the molarity of the solution containing 1.4 mol of acetic acid (HC2H3O2) in 250 ml of solution?
A. 4.5M
B. 5.6M
C. 6.5M
D. 7.6M
78. What is the normality of a 2M solution of H3PO4?
A. 2 N
B. 3 N
C. 5 N
D. 6 N
79. When egg yolk is added to oil and water vinegar to make mayonnaise, the egg yolk serves as .
A. coagulant
B. emulsifying agent
C. solvent
D. surfactant
80. Which of the following involves adsorption?
A. Plating the copper on a steel object
B. Adherence of paint to wood surfaces
C. Brown color of the eyes of the Filipinos
D. Remobal of odor inside a refrigerator using charcoal
81. Which of the following BEST describes temperature?
A. Temperature measures the total energy in something.
B. Temperature measures the kinetic energy in substance.
C. Temperature measures the total kinetic energy contained in an object.
D. Temperature measures the average molecular kinetic energy in substance.
82. The Earth receives tremendous heat coming from the sun which could be beneficial at one point and harmful to a large extent. Which of the following methods of transferring heat is being illustrated?
A. Conduction
B. Convection
C. Radiation
D. Transduction
83. A reaction takes place endothermically. Which of the following statements BEST describes endothermic reactions?
A. The temperature of the system drops.
B. The temperature of the surrounding rises.
C. The temperature of the surrounding drops.
D. The temperature of the surrounding remains the same.
84. Which of the following statements on specific heat is TRUE?
A. It is an extrinsic property.
B. It is always equal to the heat capacity.
C. It is the heat capacity per mole of a substance.
D. It is equal to zero when the heat capacity is zero.
85. The entropy usually increase when .
I. A molecule is broken into two or more smaller molecules
II. A reaction occurs that results in an increase in the number of moles of gas
III. A solid changes to a liquid
IV. A liquid changes to a gas
A. I and II only
B. III and IV only
C. I, II and III only
D. I, II, III, and IV
86. Change in enthalpy for combustion of fuel is .
A. negative
B. positive
C. zero
D. may be negative or positive
87. According to the collision theory, when does a chemical reaction occur?
A. If the colliding molecules have energy equal to greater than the activation energy.
B. If the colliding molecules have lesser than the activation energy.
C. If the colliding molecules bouncing apart did not change.
D. If there is no collision among molecules.
88. Which situation appears to violate the collision theory?
A. The reaction rate increases as temperature increases.
B. The reaction rate decreases as the reaction mixture is cooled.
C. The reaction rate increases as the surface area of the reactants increases.
D. A reaction rate takes more rapidly when the concentration of the reactants is decreased.
89. Which statements is TRUE about catalysts?
A. They increase the rate of reaction by increasing the activation energy.
B. They provide alternative reaction paths with lower activation energies.
C. The amount of catalyst decreases as the reaction progresses.
D. They are used up in the reaction.
90. Milk turns sour in one or two days when left at room temperature and yet can remain unspoiled for two weeks when refrigerated. What explains this?
A. Decrease in temperature speeds up reaction rate.
B. Decrease in temperature slows down reaction rate.
C. Milk becomes less concentrated when placed in refrigerator.
D. Milk becomes more concentrated when placed in refrigerator.
91. What factor affects sawdust to burn faster than a block of wood?
A. Concentration of reactant
B. Presence of catalyst
C. Surface area of reactant
D. Temperature
92. Which of the following observation is NOT true whenever a system is in chemical equilibrium?
A. Attainment of equilibrium requires time.
B. The rates of opposing reactions are equal.
C. The products do not change back to reactants.
D. Concentration remain constant at equilibrium even though the opposing reactions are continuing.
93. Which refers to the recorded observations and measurements in an explanation?
A. Conclusion
B. Data
C. Graph
D. Variables
94. How is hypothesis tested?
A. By gathering enough information about the problem
B. By making inferences
C. By conducting experiment
D. By formulating conclusion
95. Which summarizes a natural occurrence that may be constantly observed given the same conditions which may be expressed in words or in mathematical form?
A. Conclusion
B. Hypothesis
C. Law
D. Theory
96. Which of the following is also known as paraffin or saturated hydrocarbon?
A. Alkane
B. Alkene
C. Alkyne
D. Cycloalkane
97. Which of the following is NOT true about scientific method?
A. Conclusion is the last step
B. Scientific method may be applied in every life.
C. Scientific method is a systematic way of solving problem.
D. Scientific method is done by following a step-by-step procedure in an exact sequence.
98. Which of the following are properties of organic compound? High melting point
Low boiling point
High solubility in water
Non-conductor of electricity
A. I and II
B. I and III
C. II and III
D. II and IV
99. What is the classification of an organic compound with the formula CH3-O-CH3?
A. Alcohol
B. Ether
C. Phenol
D. Thiol
100. Which apparatus will you use to measure the mass of an irregular solid correctly?
A. Empty beaker
B. Erlenmeyer flash
C. Graduated cylinder with water
D. Vernier caliper
101. Which of the following is an organic compound?
A. Baking soda
B. Glucose
C. Limestone
D. Sulfuric acid
102. Which of the following serves as thermal insular in the body?
A. Carbohydrates
B. Fats
C. Nucleic acids
D. Proteins
103. In DNA, which is the correct complementary pairing of the nitrogenous bases?
A. AG and CT
B. AA and GG
C. AC and GC
D. AT and GC
104. Which biomolecule is considered the building blocks of tissues and organs?
A. Carbohydrates
B. Lipid
C. Nucleic acid
D. Protein
105. What is the main function of the hormone oxytocin in the body?
A. Controls water secretion by the kidneys
B. Stimulates conversion of glycogen to glucose
C. Controls blood – glucose level and storage of glycogen
D. Stimulates contraction of the uterine muscles and secretion of milk by the mammary glands
106. The half-life of thorium-234 is 24 days. How much 5g of 234th would be left after 48 days?
A. 0.625 g
B. 1.25 g
C. 2.50 g
D. 3.75 g
107. What happens when there is a loss of an alpha particle from the nucleus?
A. No change in the mass number or atomic number
B. Loss of 4 in the mass number, loss of 2 in the atomic number
C. Loss of 2 in the mass number, loss of 4 in the atomic number
D. No change in the mass number, increase of 1 in the atomic number
108. What is the balanced equation of 7031Ga that undergoes beta decay?
A. 7031Ga > 7031X + 00β
B. 7031Ga >7032X + 0-1β
C. 7031Ga >7031X + 0-1β
D. 7031Ga > 7131X + -10β
109. What is the medical application of the isotope P-32 with a half-life of 4.3 days?
A. Liver imaging
B. Gastrointestinal diagnosis
C. Treatment of leukemia
D. Treatment of hyperthyroidism
110. Which of the following poses a serious obstacle to the development of commercial fusion power plants?
A. Scarcity of deuterium
B. Public concern about safety
C. Dwindling supply of uranium
D. Exceedingly high activation energy
111. A radioisotope is considered a tracer when it used to .
A. kill cancerous tissues
B. Kill bacteria in food
C. Determine the age of artifacts
D. Determine the way plants absorb fertilizers
112. Identify the following quantities as scalar or vector respectively: mass of an object, the number of leaves on a tree, and wind velocity.
A. Scalar, Scalar, Vector
B. Scalar, Vector, Scalar
C. Vector, Scalar, Scalar
D. Vector, Scalar, Vector
113. Which of the following is a scalar quantity?
A. Acceleration
B. Temperature
C. Velocity
D. Weight
114. Which of the following describes a vector quantity?
A. It specifies direction only.
B. It specifies magnitude only.
C. It can be a dimensionless a vector quantity.
D. It specifies both magnitude and direction.
115. A man pushes against the wall with 25 pounds of force. The wall does not move. What is the resultant force?
A. -25 pounds
B. 0 pounds
C. 50 pounds
D. 75 pounds
116. In a coordinate system, a vector is oriented at angle with respect to the x axis. They components of the vector equals the vector’s magnitude multiplied by which trigonometric function?
A. Cos angle
B. Cot angle
C. Sin angle
D. Tan angle
117. An ant on a picnic table travels 30 cm due east, then 25 cm northward and finally 15 cm due west. What is the magnitude of the ant’s displacement relative to its point of origin?
A. 29 cm
B. 58 cm
C. 70 cm
D. 99 cm
118. What will happen to a moving object in the sum of all the forces acting on it is zero?
A. It will accelerate uniformly.
B. It will slow down and stop.
C. It will change the direction of its motion.
D. It will continue moving with constant velocity.
119. Acceleration is always in the direction of the .
A. displacement
B. final velocity
C. initial velocity
D. net force
120. A brick slides on the horizontal surface. Which of the following will increase the magnitude of the frictional force on it?
A. Putting a second brick on top
B. Decreasing the mass of the brick
C. Increasing the surface area of contact
D. Decreasing the surface area of contact
121. The potential energy of a body at a certain height is 100 J. The kinetic energy possessed by it when it just touches the surface of the earth is .
A. greater than the potential energy
B. less than the potential energy
C. equal to the potential energy
D. cannot be known
122. What happens to the kinetic energy of an object if tit’s speed is doubled?
A. It will be halved.
B. It will be doubled.
C. It will be tripled.
D. It will be quadrupled.
123. What is the type of energy possessed by a simple pendulum when it is at the mean position?
A. Kinetic energy
B. Mechanical energy
C. Potential energy
D. Sound energy
124. A ball is thrown upward into the air with a speed that is greater than terminal speed. On the way up, it slows down and after its speed equal the terminal speed but before it gets to the trajectory .
A. it speed up
B. its speed is constant
C. it continues to the slow down
D. its motion becomes jerky
125. When a bullet is fired from a riffle, the force in the riffle is equal to the force on the bullet. Why is it that the energy of the bullet is greater than the energy of the recoiling rifle?
A. Because there is more impulse on the bullet
B. Because the force on the bullet acts for a longer time
C. Because the force on the bullet acts for the longer distance
D. Because the bullet’s momentum is greater than that of the rifle
126. Car A has a mass of 1000 kg and the speed of 60 kph while car B has a mass of 200 kg running at a speed of 30 kph. What is the kinetic energy of car A?
A. Half that of car B
B. Equal that of car B
C. Twice that of car B
D. Four times that of car B
127. An object is thrown straight up. Which of the following is TRUE about the sign of work done by the gravitational force while the object moves up and down?
A. Work is zero on the way up, work is zero on the way down.
B. Work is negative on the way up, work is negative on the way down.
C. Work is negative on the way up, work is positive on the way down.
D. Work is positive in the way up, work is negative on the way down.
128. What happens to the kinetic energy of a moving object if the net work done is positive?
A. The kinetic energy remains the same.
B. The kinetic energy increases.
C. The kinetic energy decreases.
D. The kinetic energy is zero.
129. Object A with a mass of 4 kg is lifted vertically 3 m from the ground, object B with a mass of 2 kg is lifted 6 m up. Which of the following statement/s is/are TRUE?
I. Object A has greater potential energy since it is heavier.
II. Object B has greater potential energy since it is lifted to a higher position.
III. Two objects have the same potential energy.
A. I only
B. II only
C. III only
D. not enough information given
130. According to the scientific definition of work, pushing a table accomplishes no work unless there is .
A. an opposing force
B. a net force greater than zero
C. an applied force greater than its weight
D. movement in the same direction as the force
131. A machine does 2 500 J of work in one minute. What is the power developed by the machine?
A. 21 W
B. 42W
C. 2 500 W
D. 150 000 W
132. To which type of simple machine does a pencil sharpener belong?
A. Inclined plane
B. Lever
C. Pulley
D. Wheel and axel
133. Which of Newton’s law best explains why motorists should always wear seat belts?
A. Law of Inertia
B. Law of Acceleration
C. Law of Interaction
D. Law of Gravitation
134. The same net force is applied to object 1 and object 2. The observed acceleration of the two objects are not the same; object 1 has acceleration three times that of object 2. Which of the following is correct?
A. Object 1 has more friction than object 2.
B. Object 1 has one-third the mass of object 2.
C. Object 1 has three times the mass of object 2.
D. Object 1 has a different, less streamlined shaped than object 2.
135. The law of inertia applies to .
A. moving objects
B. objects that are not moving
C. both moving and non-moving objects
D. none of these
136. Which statement is CORRECT about the Law of Conversation of Energy?
A. The total amount of energy is constant.
B. Energy cannot be used faster than it is created.
C. The supply of energy is limited so we must conserve.
D. Energy must be conserved and you are breaking a law if you waste energy.
137. Which of the following can transform electrical energy to mechanical energy?
A. Electric bulb
B. Electric fan
C. Loud speaker
D. Television
138. Celso is making a picture frame. He sticks a nail into a piece of wood and hits the nail with a hammer. Which form of energy is NOT released when the hammer hits the nail?
A. Chemical
B. Kinetic
C. Sound
D. Thermal
139. Butch throws a baseball into the air. It rises, stops when it reaches its greatest height, and the falls back to the ground. At what point is kinetic energy initially converted to potential energy?
A. When the baseball is rising
B. When the baseball is falling
C. Just after the baseball hits the ground
D. While the baseball is stopped in the air
140. Which energy conversation takes place when a toaster is switched on?
A. Chemical to sound
B. Chemical to thermal
C. Electrical to sound
D. Electrical to thermal
141. When coal is burned to produce electricity, the electrical energy produced is less than the potential energy of the coal. Which BEST explains this observation?
A. The amount energy in the coal is not known.
B. As the coil is heated, the molecules move so fast that they are destroyed.
C. Some of the potential energy in the coal is converted into forms of energy other than electricity.
D. Some of the potential energy in the coal requires more intense heat so that can be compared to electricity.
142. What is the TRUE of all combinations of resistors arranged in parallel?
I. Current spilts down each leg of the combination.
II. Voltage is constant across each leg of the combination. III.Resistance is the same for each leg of the combination.
A. I and II only
B. I and II only
C. II and II only
D. I, II and III
143. What is the closed, continuous path through which electrons can flow?
A. Charge
B. Circuit
C. Resistor
D. Voltage
144. What will be your charge if you scrape electrons from your feet while scuffing across the rug?
A. Negative
B. Neutral
C. Positive
D. Not enough information given
145. How will you force charge if the distance between the two charge spheres is doubled?
A. The force is doubled.
B. The force is tripled.
C. The force is quadrupled.
D. The force is multiplied eight times.
146. A 6 ohm and 12 ohm resistors are connected in parallel with each other to a battery. Which of the following is TRUE?
A. More current will flow through the 20 ohm resistor.
B. The current flowing through the resistor is the same.
C. The resistor values must be equal for the circuit to work.
D. The potential difference across the two resistors is the same .
147. A new 1.5 V dry cell furnishes 30 A when short-circuited. Find the internal resistance of the cell.
A. 0.05 Ω
B. 0.10 Ω
C. 1.5 Ω
D. 30 Ω
148. If three identical lamps are connected in parallel to A 6 V dry cell, what is the voltage drop across each lamp?
A. 2 V
B. 3 V
C. 6 V
D. 18 V
149. Which of the following describes an electric current?
A. Regulates the movement of electric charge
B. The opposition material offers to the electron flow
C. The electric pressure that causes charged particles to flow
D. The movement of charged particles in the specific direction
150. A 10 W bulb and a 20 W bulb are connected in a series circuit. Which bulb has the more current flowing in it?
A. The 10 W bulb
B. The 20 W bulb
C. Both bulbs have the same current
D. Cannot be determined
151. Which of the following are characteristics of a series circuit?
I. The current that flows through each resistance is the same as the total current throughout the circuit.
II. The sum of all the individual voltage drops in the same as the applied voltage.
III. The reciprocal of the total resistance is equal to the sum of the reciprocal of the separate resistances.
IV. The voltage drop in each resistance is the same as the magnitude of the applied voltage.
A. I and II only
B. I and III only
C. III and IV only
D. I, II, and III only
152. Which states that the sum of all potential rises and potential drops in any loop (closed circuit ) is zero?
A. Coulomb’s Law
B. Kirchoff’s Law
C. Law of Electrolysis
D. Ohm’s Law
153. A television and an electric fan are connected in parallel top a 220 V line. The current in the television is 8 A and in the electric fan is 3 A. What is the current flowing in the line?
A. 2.67 A
B. 5 A
C. 11 A
D. 24 A
154. What happens to the current if resistance increases?
A. Decreases
B. Increases
C. No change
D. Cannot be determined
155. Which of the following statement DOES NOT represent Ohm’s Law?
A. Current/potential difference =constant
B. Potential difference/current = constant
C. Potential difference = current x resistance
D. Current = resistance x potential difference
156. An iron nail can be turned into a temporary magnet if it is held in a strong magnet field. Which method of magnetization is this?
A. Charging
B. Conduction
C. Introduction
D. Saturation
157. What is the resistance of an electric bulb drawing 1.2 A current and 6.0 V?
A. 0.2 Ω
B. 0.5 Ω
C. 2 Ω
D. 5 Ω
158. What happens to the current-carrying ability of a wire as temperature increases?
A. There is no change.
B. The wire can’t carry any current.
C. The wire can carry more current.
D. The wire can carry less current.
159. A 300 W at 220 V TV set is used at an average of 4 hours a day for 30 days. If the electrical energy costs Php 1.60 per kilowatt-hour, how much is the energy cost?
A. Php 5.76
B. Php 22.50
C. Php 57.60
D. Php 225.00
160. Electromagnetic radiation can be used for wireless communications. Which of the following can be used to transmit signals such as mobile phone calls?
A. Infrared
B. Gamma
C. Microwaves
D. Radiowaves
161. Which statement about the North-magnetic pole of the Earth is TRUE?
A. Its location never changes.
B. It corresponds to the N-pole of a bar magnet.
C. It corresponds to the S-pole of a bar magnet.
D. It is at the same location as the geographic north pole of the Earth
162. An iron nail can be turned into a temporary magnet if it is held in a strong magnet field. Which method of magnetization is this?
A. Charging
B. Conduction
C. Introduction
D. Saturation
163. Which of the following factors affect the size of the induced current in a coil?
I. Number of turns in the coil
II. Size of the inducing field III.Direction of the winding in the coil
IV. Resistance of the wire in the coil
A. I and II only
B. III and IV only
C. I, II, and III only
D. I, II, and IV only
164. To use the right hand rule to predict the direction of n induced current in a coil, your thumb must point .
A. to the direction of the motion of the wire
B. to the S-pole of the induced magnetic field
C. in the direction of the induced current
D. in the direction of the inducing field
165. When a bar magnet is inserted into a coil, a current of 12.0 A is induced in the coil. If four magnets of the same type are inserted into a coil at the same time, what would be the induced current?
A. 3 A
B. 4 A
C. 12 A
D. 48 A
166. Which of the following involves adsorption?
A. Plating the copper on a steel object
B. Adherence of paint to wood surfaces
C. Brown color of the eyes of the Filipinos
D. Remobal of odor inside a refrigerator using charcoal
167. Which of the following BEST describes temperature?
A. Temperature measures the total energy in something.
B. Temperature measures the kinetic energy in substance.
C. Temperature measures the total kinetic energy contained in an object.
D. Temperature measures the average molecular kinetic energy in substance.
168. What is the direction of a magnetic field within a magnet?
A. From north to south
B. From south to north
C. Front to back
D. Back to front
169. Which is the induced voltage across a stationary conductor in a stationary magnetic field?
A. Decreased
B. Increased
C. Zero
D. Reversed in polarity
170. What is the magneto motive force (mmf) of a wire with 8 turns carrying 3 A of current?
A. 2. 67
B. 24
C. 240
D. 2400
171. A coil of wire is placed in a charging magnet field. If the number of turns in the coil is decreased, what will happen to the voltage induced across the coil?
A. Remain constant
B. Be excessive
C. Decrease
D. Increase
172. Which of the following is TRUE about the frequency and velocity of electromagnetic waves?
A. Frequency and wavelength are interdependent of each other
B. As frequency increases, wavelength decreases
C. As frequency increases, wavelength increases
D. Frequency is constant for all wavelengths
173. Which of the following correctly lists electromagnetic waves in order form longest to shortest wave length?
A. Television, infrared, visible light, X-rays
B. Gamma rays, ultraviolet, infrared, microwaves
C. Radio waves, infrared, gamma rays, ultraviolet
D. Micro waves, ultraviolet, visible light, gamma rays
174. An electromagnetic wave is radiated by a straight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna?
A. Diagonally
B. Vertically
C. Horizontally and in a direction parallel to the wave’s direction of motion
D. Horizontally and in a direction perpendicular to the wave’s direction of motion
175. What should a good diode tested with an ohmmeter indicate?
A. High resistance when forward or reverse biased
B. Low resistance when forward or reverse biased
C. High resistance when reverse biased and low resistance when forward biased
D. High resistance when forward biased and low resistance when forward biased
176. Vacuum tubes in a radio transmitter are used to .
A. record programs
B. provide DC supply
C. generate high power radio waves
D. provide lighting inside the studio
177. Which material is the usual component of an anode?
A. Aluminum
B. Carbon
C. Copper
D. Nickel
178. A metal spoon is placed in a cup filled with hot coffee. After sometime, the exposed end of the spoon becomes hot even without a direct contact with the liquid. What explains this phenomenon?
A. Conduction
B. Convection
C. Radiation
D. Thermal expansion
179. Which cause the warmth that you fell when you place your finger at the side of the flame of a burning candle?
A. Conduction
B. Convection
C. Radiation
D. Not enough information given
180. Which process of heat transfer happens by the movement of mass from one place to another?
A. Conduction
B. Convection
C. Induction
D. Radiation
181. When work is done by a system, what happens to its temperature assuming that no heat is added to it?
A. Decreases
B. Increases
C. Remains the same
D. None of these
182. Which states that “when two systems are in thermal equilibrium with a third system, then they are in thermal equilibrium with each other?
A. Zeroth Law of Thermodynamics
B. First Law of Thermodynamics
C. Second Law of Thermodynamics
D. Mechanical Equivalent of Heat
183. What happens in an adiabatic process?
A. No heat enters or leaves the system.
B. The pressure of the system remains constant.
C. The temperature of the system remains constant.
D. The system does no work nor work is done on it.
184. What thermodynamic process is involved in a closed car inside a hot garage?
A. Adiabatic
B. Isobaric
C. Isochoric
D. Isothermal
185. Consider the thermal energy transfer during a chemical process. When heat is transferred to the system, the process is said to be and the sign of H is .
A. endothermic, positive
B. endothermic, negative
C. exothermic, positive
D. exothermic, negative
186. Which of the following statements is FALSE?
A. Entropy increases with the number of microstates of the system.
B. Any irreversible process results in an overall increase in entropy.
C. The total entropy of the universe in any spontaneous process.
D. The change in entropy in a system depends on the initial and final states of the system and the path taken from one state to the order.
187. During a refrigeration cycle, heat is rejected by the refrigerant in .
A. compressor
B. condenser
C. evaporator
D. expansion valve
188. Which of the following CORRECTLY describes a refrigeration system?
A. Rejects energy to a low temperature body.
B. Rejects energy to a high temperature body.
C. Removes heat from a low temperature body and delivers it to a high temperature body.
D. Removes heat from a high temperature body and delivers it to a low temperature body.
189. Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?
A. Ammonia
B. Carbon dioxide
C. Fluorine
D. Sulfur dioxide
190. Which phenomenon is BEST explains by the particle nature of light?
A. Doppler effect
B. Interference
C. Photoelectric effect
D. Polarization
191. According to the quantum theory of light, the energy of light is carried in discrete unit called .
A. alpha particles
B. photoelectrons
C. photons
D. protons
192. Ruther ford observed that most of the alpha particles directed at a metallic foil appear to pass through unhindered, with only a few deflected at large angles. What did he conclude?
A. Atoms can easily absorb and re-emit alpha particles
B. Atoms consist mainly of empty space and have small, dense nuclei.
C. Alpha particles behave like waves when they interact with atom.
D. Atoms have most of their mass distributed loosely in an electron cloud.
193. When an electron change from a higher energy to a lower energy state within an atom, a quantum of energy is .
A. absorbed
B. emitted
C. fissioned
D. fused
194. When does nuclear fission occur?
A. When we cut nuclei into two with a very small cutting device
B. When one nucleus bumps into another causing a chain reaction
C. When a nucleus divides spontaneously, with no apparent reason
D. When electrical force inside a nucleus overpower forces
195. When does nuclear fusion release energy?
A. When uranium emits a neutron
B. When heavy ions fuse together
C. When very light nuclei fuse together
D. When uranium spits into two fragments
196. Albert Einstein’s Second postulate of Special Relativity state that the speed of light .
A. can decrease if the speed of the observer decreases
B. can increase if the speed of the observer increases
C. randomly changes depending upon its original light source
D. is constant regardless of the speed of the observer or the light source
197. A passenger train travels east at high speed. One passenger is located at the east side of one car, another is located at the west side of that car. In the train’s frame, these two passengers glance up the same time. In the earth’s frame .
A. they glance up simultaneously
B. the passengers glance sideways
C. the passenger at the east side glances up first
D. the passenger at the west side glances up first
198. Benie11 travels at high speed from Earth to the star Alpha Centauri which four light years away. Which one is CORRECT in Benie11’s frame?
A. The clocks on earth and on Alpha Centauri are synchronized.
B. The trip takes more time than it does in the earth’s frame
C. Benie11 travels to Alpha Centauri over a length that is shorter than four light years.
D. Alpha Centauri travels to Benie11 over a length that is shorter than four light years.
199. One clock is placed on top of a mountain and another clock is at the bottom the mountain. Ignore the rotation of the earth. Which clock ticks more slowly?
A. They tick at the same rate.
B. The one on top of the mountain.
C. The one at the bottom of the mountain.
D. Cannot be determined.
200. You are in a windowless spacecraft. What do you need to do determine whether your space ship is moving at constant non-zero velocity, or is at rest, in an inertial frame of earth?
A. Make very precise time measurements.
B. Make very precise mass measurements.
C. Make very precise length and time measurements.
D. Nothing, because you cannot succeed no matter what you do.
201. According to the effects of length contraction, from the viewpoint of an observer stationary with respect to a body moving at a uniform speed relative to the observer, which one is CORRECT?
A. The body contracts along the direction of the motion.
B. The time it takes for a clock incorporated in the body to tick contracts.
C. The body is not now contracted but would contract if it were accelerate.
D. The body contracts in some direction traverse to the direction of motion.
202. April and May are identical twins. One day, April embarked on a high-speed space travel into a distance star. When he gets back home, who is older between the two?
A. April
B. May
C. None of them because they are still of the same age
D. Cannot be determined
203. An accelerated frame is a non-inertial frame. Is this TRUE?
A. True
B. False
C. Sometimes true, sometimes false
D. Not enough information given
204. What is the rest energy of a single proton which has a rest mass of 1.67 x 10 -27kg?
A. 1.50 x 10 J
B. 1.50 x 101 J
C. 1.50 x 10-10J
D. 1.50 x 10-10J
205. Which of the following statements is TRUE about the speed of light?
A. The speed of light has a value that depends on the observer’s frame of reference.
B. The speed of light has the same value for observers in all reference frames.
C. The speed of light is constant in an inertial frame of reference.
D. The speed of light is slower in a moving frame of reference.
206. A person is riding a moped that is travelling at 20 m/s. What is the speed of the ball if the moped rider throws a ball forward at 4 m/s while riding the moped?
A. 16 m/s
B. 20 m/s
C. 24 m/s
D. 80 m/s
207. According to Einstein, what is considered the fourth dimension?
A. Curled dimension
B. Horizontal dimension
C. Space dimension
D. Time dimension
208. As you observe a fish inside an aquarium, the fish appears to be bigger when underwater. When observed through the side, the fish seems closer than if you observe over the top. When you look through the corner, it appears to be that there are two fishes. What explains this observation?
A. Diffraction
B. Interference
C. Reflection
D. Refraction
209. What is the phenomenon by which the accident light falling on a surface is back into the same medium?
A. Absorption
B. Polarization
C. Reflection
D. Refraction
210. Which property is responsible for alternating light and dark bonds when light passes through two or more narrow slits?
A. Diffraction
B. Interference
C. Polarization
D. Refraction
211. What happens when a light wave enters into a medium of different optical density?
A. Its speed and frequency change.
B. Its speed and wavelength change.
C. Its frequency and wavelength change.
D. Its speed, frequency and wavelength change.
212. If carbon tetrachloride has an index of refraction of 1.461, what is the speed of light through this liquid? (c= 3.00 x 108 m/s)
A. 1.46 x 108 m/s
B. 2.05 x 108 m/s
C. 4.38 x 108 m/s
D. 4.46 x 108 m/s
213. A ray of light in air is incident of an air-to-glass boundary at an angle of 36 degrees with the normal. If the index of refraction of the glass is 1.65, what is the angle of the refracted ray within the glass with respect to the normal?
A. 18 degrees
B. 30 degrees
C. 46 degree
D. 56 degrees
214. If the critical angle for internal reflection inside a certain transparent material is found 48 degrees, what is the index of refraction of the material? ( air is outside the material )
A. 0.74
B. 1.35
C. 1. 48
D. 1.53
215. According to the law of reflection, from what angle is light coming after it is reflected from a mirror?
A. The same angle as the incident ray as measured from the surface of the mirror
B. The same angle as the incident ray as measured from the normal to the mirror
C. Some light comes directly from the object and some passes through the mirror
D. Cannot be determined
216. Two planed mirror are positioned perpendicular to each other. A ray of rad light incident on mirror at an angle of 55ᵒ . This ray is reflected from mirror 1 and then strikes 2 and is reflected again. The angle of reflection will be .
A. 35ᵒ
B. 45ᵒ
C. 55ᵒ
D. 70ᵒ
217. A point object is placed in front of a plane mirror. Which is the correct location of the image by the mirror?
A. A
B. B
C. C
D. D
218. Which of the following is the BEST description of a white light?
A. It is a mixture of every color.
B. It is a mixture of seven color.
C. It is a mixture of red, blue and yellow.
D. It is a pure color that cannot be broken up.
219. Which of the following observation is NOT true whenever a system is in chemical equilibrium?
A. Attainment of equilibrium requires time.
B. The rates of opposing reactions are equal.
C. The products do not change back to reactants.
D. Concentration remain constant at equilibrium even though the opposing reactions are continuing.
220. Sunsets often appears to have a more reddish-orange color than noon. Which of the following phenomenon is responsible for this effect?
A. Rayleigh Scattering
B. Dispersion
C. Polarization
D. Refraction
221. The polarization behavior of light is BEST explained by considering light to be .
A. particles
B. transverse waves
C. longitudinal waves
D. unpolarized
222. Which type of light is vibrates in a variety of planes?
A. Electromagnetic
B. Polarized
C. Transverse
D. Unpolarized
223. Light is passed through a filter whose transmission axis is aligned horizontally. It then passes through a second filter whose transmission axis is aligned vertically. What will happen to the light after passing through both filters?
A. It will be polarized
B. It will be un polarized
C. It will be entirely blocked.
D. It will return to its original state.
224. Light rays enter a material and scatter. Which BEST describes what happens to the light rays.
A. Bounce straight back
B. Move straight through
C. Spread out in all direction
D. Move through but in a new direction
225. The energy generated by the suns travels to Earth as electromagnetic waves of varying lengths. Which statement correctly describes an electromagnetic wave with a long wavelength?
A. It has a high frequency and low energy.
B. It has a high frequency and high energy.
C. It has a low frequency and can travel through a vacuum.
D. It has a low frequency and needs a medium to travel through.
226. Why is the sky blue?
A. It reflects the color of the ocean
B. The color of the outer space is blue.
C. Blue light is more readily scattered than red light by nitrogen.
D. Red light is scatted more easily than blue light by dust particles.
227. What human activity has added the most carbon in the atmosphere?
A. Burning fossils fuels
B. Mining fossil fuel
C. Increasing soil erosion
D. Cutting down the rainforests
228. Which of the following BEST describes the image for a thin diverging lens that forms whenever the magnitude of the object distance is less than that of the lens’ focal length?
A. Inverted, reduced, and real
B. Inverted, enlarged, and real
C. Upright, reduced, and virtual
D. Upright, enlarged and virtual
229. Acid rain is formed when sulfur oxides react with water in air. It causes lakes and streams decrease in pH which makes it unable to support fish and plant life. Which is the LEAST means of solving this problem?
A. Limestone may be added to the water basins.
B. Neutralize sulfur oxides with basic compounds.
C. Reduction of sulfur emissions from the industrial establishments.
D. Providing absorbent colloidal materials to screen acid rain before hitting the water.
230. Which of the following would decrease the rate in which a solid dissolves in a liquid?
A. Supersaturating the solution
B. Applying pressure into the solution
C. Grinding the solid into smaller pieces
D. Increasing the temperature of an exothermic reaction
231. Which factors affects the rate of dissolution when powdered sugar dissolves more rapidly than granulated sugar?
A. Application of heat
B. Nature of solute
C. Particle size
D. Stirring
232. What is the physical evidence that the core is composed mostly in iron?
A. Volcanoes regularly erupt material from the core to the surface.
B. Scientist have sampled the core and determined its composition.
C. The known mass of Earth requires material of high density at the core.
D. A and B
233. Which of the following comprised the largest portion of Earth’s volume?
A. Crust
B. Inner core
C. Mantle
D. Outer core
234. Which of the following statements about the Mohorovicic discontinuity is False?
A. The Moho separates the crust from the mantle.
B. The Moho marks the top of a partially molten layer.
C. The Moho separates denser rocks below from less dense rocks above.
D. Seismic wave speeds up as they pass across the Moho heading downward.
235. Where do P waves travel fastest?
A. Upper mantle
B. Lower mantle
C. Outer core
D. Inner core
236. What is the driving force for the movement of the lithospheric plates?
A. Heat from the sun
B. Heat in the atmosphere
C. Unequal distribution of heat within the Earth
D. Unequal distribution of heat in the oceans
237. Which evidence supports Alfred Wegener’s Continental Drift Theory?
A. Major rivers on different continents match
B. Land bridge still exist that connect major continents
C. The same magnetic direction exist on different continents
D. Fossils of the same organism have been found on different continents
238. Which of the following is TRUE based on the Plate Tectonics Theory?
A. The asthenosphere is strong and rigid.
B. The lithosphere is divided into plates.
C. The asthenosphere is divided into plates.
D. The asthenosphere moves over the lithosphere.
239. What type of boundary occurs where two plates move together, causing one plate to descend into the mantle beneath the outer plate?
A. Convergent boundary
B. Divergent boundary
C. Transform fault boundary
D. Transitional boundary
240. Which are considered as most destructive earthquake waves?
A. P waves
B. Q waves
C. S Waves
D. Surface waves
241. Which of the following conditions rather than faulting
A. Low temperatures and low confining pressures
B. Low temperatures and high confining pressures
C. High temperatures and low confining pressures
D. High temperatures and high confining pressures
242. In which of the following climates will chemical weathering be most rapid?
A. Hot and dry
B. Cold and dry
C. Hot and humid
D. Cold and humid
243. Which of the following statements about weathering is false?
A. Rock of different composition weather at different rates.
B. Heat and heavy rainfall increase the rate of chemical weathering.
C. The presence of soil slows down the weathering of the underlying bedrock.
D. The longer a rock is exposed at the surface, the more weathered becomes.
244. Why do agricultural areas often experience the greatest amount of soil erosion?
A. Because farms are typically located near streams
B. Because farmers usually remove trees from their fields
C. Because they typically occur in areas of moderately steep slopes
D. Because farming usually involves plowing the soil to plant seeds
245. What can happen to global temperatures for several years after a volcanic eruption.
A. Temperatures may increase
B. Temperatures may decrease
C. Temperatures can create more volcanoes
D. Temperatures are not affected by volcanic eruptions
246. Which of the following correctly describe diastrophism?
A. It refers to the boundaries between crustal plates.
B. It refers to a discredited theory of continent formation.
C. It refers to all process in which magma moves from Earth’s surface to or near the surface.
D. It refers to all the deformation of Earth’s crust by bending or breaking in response to great pressures exerted either from below or from within the crust.
247. What is the evaporation of water from plant surface especially through stomates?
A. Condensation
B. Perpiration
C. Respiration
D. Transpiration
248. Which of the following processes form clouds?
A. Condensation
B. Evaporation
C. Precipitation
D. Transpiration
249. Which of the following is/are a natural factors that may disrupt the water cycle?
A. Water pollution
B. Drying of ground water
C. Mismanaged domestic and industrial use of water
D. Both A and C
250. Fresh water is an integral part of hydrologic cycle. How is it produced?
A. Condensation
B. Desalination
C. Evaporation
D. Transpiration
251. Fresh water is an integral part of hydrologic cycle. How is it produced?
A. Condensation
B. Desalination
C. Evaporation
D. Transpiration
252. Which of the following is included in the term hydrosphere?
A. All the water on the planet.
B. All the freshwater on the planet.
C. All water on the surface of the continents.
D. All the liquid water on the Earth, minus ice.
253. What is the main difference between swamps and marshes?
A. Trees versus grassland
B. High water table versus low
C. Salt water versus fresh water
D. Seasonality of precipitation
254. Alake will become saline if .
A. lake levels decrease
B. precipitation exceeds evaporation
C. evaporation exceeds precipitation
D. the lake has no natural drainage outlet
255. What is the other name of typhoon?
A. Low pressure area
B. Hurricane
C. Tornado
D. Twister
256. What is the difference among typhoon, a hurricane, and a cyclone?
A. While typhoons are strong storms, cyclones are worse, and hurricanes are the strongest of all.
B. Hurricanes spin clockwise, cyclone spin counter clockwise, and typhoons are actually tidal waves.
C. Typhoons are found near the equator, hurricanes in the midlatitudes ad typhoons in the arctic and antartic.
D. The storms are the same but the manes are used in the Western Pacific North America and Indian Ocean, respectively.
257. Which one of these revolving weather is the smallest?
A. Hurricane
B. Tornado
C. Tropical Cyclone
D. Typhoon
258. What happens when the rate of evaporation equals the rate of condensation?
A. Clouds form.
B. Precipitation occurs.
C. The humidity decreases.
D. The dew point is reached.
259. Which is the cause of change of seasons?
A. The rotation of the Earth
B. The tilt Earth’s axis
C. The rain-shadow effect
D. The sizes and shapes of land surface features
260. What causes changes in weather?
A. Cloud formation
B. Water evaporation
C. Air humidity
D. Air masses interaction
261. What part of the atmosphere protects Earth’s surface from harmful ultraviolet radiation?
A. Exosphere
B. Mesosphere
C. Stratosphere
D. Troposphere
262. The aurora borealis and aurora australis are caused by interaction between charged particles and Earth’s magnetic field. What layer of Earth’s atmosphere contain these particles?
A. Exosphere
B. Mesosphere
C. Ozonosphere
D. Thermosphere
263. Which is a deep layer of electrically charged molecules and atoms that reflects radio waves?
A. Exosphere
B. Ionosphere
C. Radiosphere
D. Troposphere
264. The Earth completes one revolution around the sun in 365 days. Compared the earth, how long does it take Mercury to complete one revolution?
A. Less than the Earth
B. Greater than the Earth
C. The same as the Earth
D. Cannot be determined
265. What two properties of stars are being directly compared in the Hertzsprung- Russel Diagram?
I. Size
II. Temperature
III. Luminuosity
IV. Density
A. I and II
B. II and III
C. III and IV
D. I and IV
266. How is the atmospheric pressure of Mars when compared to the atmospheric pressure of the Earth?
A. Half as much as that of the Earth
B. About the same as the Earth
C. About 1/100th that of the Earth
D. About 100 times as great as the Earth
267. Which of the following statements is TRUE for both Saturn and Jupiter?
A. Both rotate faster than the Earth.
B. Both rotate slower than the Earth.
C. Only one rotates rapidly while the rotates very slowly.
D. Their periods of rotation are linked to their period of revolution.
268. According to Kepler’s Law, what is the shape of all orbits of the planets?
A. Ellipse
b. Hyperbola
C. Oblate spheroid
D. Parabola
269. What is the first successful space rotation program that tested the ability of astronauts to work for long periods and studied their body responses to weightless condition?
A. Apollo 11
B. Sputnik I
C. Salyut
D. US Skylab
270. The universe is estimated to be between ten and twenty billion years old. This estimate is based on the value of which constants?
A. Speed of light
B. Hubble constant
C. Mass of the Earth
D. Mass of the electron
271. On which of the following planets would the sun rise in the west?
A. Mars
B. Jupiter
C. Saturn
D. Venus
272. Which of the following describes an albedo?
A. Brightness of the star
B. Phase changes of a planet
C. Wobbling motion of a planet
D. Amount of light a planet reflects
273. Where are most asteroids located?
A. Between Earth and Mars
B. Between Mars and Venus
C. Between Mars and Jupiter
D. Between Jupiter and Saturn
274. Which refers to the precision of the Earth?
A. Change night to day
B. Earth’ motion around the sun
C. Effect of the moon on the Earth’s orbit
D. Change in orientation of the Earth’s axis
275. What kind of eclipse do we see when the moon is entirely within the Earth’s umbra shadow?
A. Total solar
B. Total lunar
C. Partial solar
D. Partial lunar
276. At which phase of the moon do solar eclipses occur?
A. Full moon
B. First quarter
c. New moon
D. Third quarter
277. If lunar eclipse occurs tonight, when is the soonest that a solar eclipse can occur?
A. Tomorrow
B. In two weeks
C. In one month
D. In one year
278. Which one is considered as one of the most important results of the Apollo missions to the moon?
A. Discovery of subsurface of water
B. Determination of the age of moon rocks
C. First observations of surface features called craters
D. Proof that craters were produced by volcanic eruptions
279. What is the problem experienced by astronauts staying for long periods of time aboard the international space station?
A. Weight loss due to diet
B. Determined of the age of moon rocks
C. Muscle loss due to lack of exercise
D. Effects of lower gravity on the body
280. NASA development a filtration process to make waste water on space flights renewable. Where might this filtration process be used on Earth?
A. In areas where water is salty
B. In areas where water is contaminated
C. In areas where water is used for recreation
D. In areas where water contains hard minerals
Physical Science Part 8
281. What must be done in order to preserve the biosphere for future generations?
A. Put all wild animals and game preserves.
B. Make use of technology to develop.
C. Explore ways to drain and fill wetlands along the sea coast.
D. Understand how living things interact with their environment.
282. Which of the following can help ensure a suitable environment for the future generations?
A. Biological controls
B. Chemical dumps
C. Fossils fuels
D. Pesticides
283. Which human activity would be more likely to have a negative impact on the environment?
A. Investigating the use of the biological controls for the pests
B. Using reforestation and cover cropping to control soil erosion
C. Using insecticides to kill insects that compete with human for food
D. Developing a research aimed toward the preservation of endangered species
284. Which is the main cause of the depletion of the ozone layer?
A. Decrease in temperature
B. Decrease in the amount of air pollutants
C. Increase in number of marine ecosystem
D. Increase in temperature due to atmospheric pollutants
285. DDT was used to kill mosquitoes. It was observed that lizards that ate the mosquitoes slowed down and died. Eventually, the pollution of cats that eat lizards diminished. What can be inferred from this situation?
A. DDT can cause harm to all organisms.
B. Using DDT is a reliable way to eliminate insect predators.
C. The mosquito and other organisms were all competing for same resources.
D. Environmental changes that affect one population can affect other population.
286. Butch is a seasoned farmer updated a new trends in agriculture. In effort to make and harvest the best rice crops, he tried to implement the environmentalist’s way of controlling pests as mandated in the integrated pest management. Butch later found out that all of the following processes made best contributions to a good and safe harvest EXCEPT .
A. use of natural enemies
B. planting variety of crops
C. use of narrow-spectrum pesticides
D. use of genetically engineered crops
287. What is the most important factor for the success of animal population?
A. Adaptability
B. Interspecies activity
C. Natality
D. Unlimited food
288. Why dues starvation occur?
A. There is not enough fertile land worldwide on which to grow food.
B. Forces in nature (drought, pests, floods ) wipe out food supplies.
C. Population is growing at a faster rate than the world’s ability to produce.
D. Some parts of the world lack food while other parts of the world produce more than they consume.
289. Which of the following presents the greatest threat to the survival of numerous plant and animal species?
A. Greenhouse effect
B. Continued burning of fossil fuel
C. Disappearance of world’s rainforest
D. Dumping of toxic waste in the least industrialized nations
290. Which factors BEST explains why the human population has grown so rapidly over the last 1000 years?
A. Humans have decreased their reliance on natural resources.
B. Humans have increased the amount of resources available on Earth.
C. Humans have increased the carrying capacity of the biosphere for the population.
D. Humans have developed physical characteristics that increase their competitive advantage.
291. Which human activity causes maximum environmental pollution having regional and global impact?
A. Agriculture
B. Industrialization
C. Mining
D. Urbanization
292. Which of the following statement in relation to sustainable development is FALSE?
A. Sustainability has the main objective of purely focusing on the natural environment.
B. Sustainable development of various countries and the entire world is the only solution left with mankind to survive for a longer period on Earth.
C. Sustainable development not only considers the protection of the environment but also the maintenance of economic viability as well as social and ethical considerations.
D. Sustainable development is defined as the development that meets the needs of present without compromising the ability of our future generation to meet their own needs.
293. What is the process of converting nitrate to nitrogen gas and nitrous oxide?
A. Ammonification
B. Denitrification
C. Nitrogen fixation
D. Transpiration
294. Which of the following chemicals enters living organism primarily from the atmosphere rather than from rocks or soil?
A. Calcium
B. Carbon
C. Sodium
D. Sulfur
295. What is the conversation of atmospheric free nitrogen gas to ammonia which occurs through the activities of certain bacteria and cyanobacteria?
A. Denitrification
B. Nitrification
C. Nitrogen fixation
D. Oxidation
296. How do animals get the nitrogen they need?
A. Directly from bacteria in the soil
B. From the process of denitrification
C. By breathing in atmospheric nitrogen
D. By consuming plants or other animals
297. The following are ways by which phosphorous enters the environment EXCEPT .
A. Run off
B. Animal waste
C. Erosion of rocks
D. Photosynthesis in plants
298. Because of biogeochemical cycling?
A. nutrients are circulated through the biosphere.
B. the Earth creates new chemicals that replace those that were used up by organisms.
C. organisms eventually run out of needed elements, compounds and other form of matter.
D. human activity has no effect on elements, chemical compounds, and other form of matter
299. Which of the biogeochemical cycles can impact all of the other directly?
A. Carbon cycle
B. Hydrologic cycle
C. Nitrogen cycle
D. Phosphorous cycle
300. What human activity has added the most carbon in the atmosphere?
A. Burning fossils fuels
B. Mining fossil fuel
C. Increasing soil erosion
D. Cutting down the rainforests
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- C
- A
- D
- C
- C
- B
- A
- B
- B
- C
- D
- D
- A
- B
- A
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