PHYSICAL SCIENCES

MULTIPLE CHOICE

1. A machine puts out 100 watts for every 1000 watts put into it. What is the efficiency of the machine a. 90% b. 50% c. 100%` d. 10%

2. If an object mode of a material whose specific gravity is less than one is immersed in water, it will__________a. Remain at equilibrium b. Absorb a small amount c. Float d. Sink

3. If you are to cook eggs by boiling and you are in high mountain, you have to________a. Use a hotter flame b. Use more water to boil c. Boil for a shorter time d. Boil for a longer time

4. A coconut falls freely with a constant acceleration of 9.8 m/s. What does this mean?a. The coconut falls 9.8 m during the first

second only b. The speed of the coconut decreases

9.8m/s every second c. The coconut falls 9.8 m for each roundd. The speed of the coconut increases 9.8

m/s every second 5. In the absence of air resistance, a projectile

has a maximum range when thrown at an angle of _______a. 30 degreesb. 60 degrees c. 45 degreesd. 90 degrees

6. An object maintains its state of motion because it hasa. Acceleration b. Massc. Speed d. Velocity

7. A free-floating astronaut pushes a force floating package in space. If the mass of the astronaut is greater than that of the package, the force exerted by the astronaut is ___________a. Greater than the one exerted by the

package b. Less than that of the package c. Not possible to determine d. Equal to that exerted by the packages

8. Which of the following objects that roll down an incline have the greatest acceleration?a. Acceleration is independent of rotational

inertia in the caseb. Objects with large rotational inertia c. There is not enough information to say d. Objects with small rotational inertia

9. A car that is towing a trailer is accelerating on a level road. The force that the car exerts on the trailer is _________a. Equal to the force exerted by the trailerb. Less than the force exerted by the trailer c. Equal to the force the road exerts on the

trailerd. Greater than the force exerted by the

trailer 10. An object at rest may have

a. Momentum b. Speed c. Velocity d. Energy

11. A solid was changed to gas without passing through the liquid state by a process called______a. Evaporation b. Fusion c. Sublimation d. Condensation

12. A 400 N woman stands on top of a very tall ladder so she is one earth radius above the earth’s surface. How much does she weight?a. 200 Nb. 400 Nc. Zero d. 100 N

13. A pendulum bob with a mass of 2 kg is supported by a rope. What is the tension on the rope?a. Zero b. 19.6 Nc. 2 Nd. 10 N

14. Which law of motion could explain what happens every time we walk?a. Law of inertia b. Law of interaction c. Law of universal gravitation d. Everyone reacts by resisting a change

15. The propulsion of jets and rockets is based on Newton’s law of _____a. Inertia b. Gravitation c. Acceleration d. Interaction

16. A force of 1 N acting through a distance of 1 m in the same direction as the force is termed a/an____a. Newton b. Erg c. Second d. Joule

17. Airplanes are designed with pointed noses and thin tails in order to ________a. Fight the forward thrust on the airplane b. Reduce a force called drag which slows it

downc. Produce fluid friction as the airplane

moves d. Increase the lift of the wings and the body

18. How many joules of work are done on an object when a force of 10 N pushes it 5 m a. 50 jb. 2 jc. 5 jd. 10 j

19. The surface of ice cubes formed is slightly higher than the surface of the water placed the ice cube tray because__________a. The molecules transferred the heat energy

fast b. The motion of the molecules changed c. Water expanded slightly from 4 deg C to o

Deg Cd. Water molecules became bigger before

freezing

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20. The temperature at which a substance changes from the liquid phase to the gas phase called ________a. Solidification b. Freezing point c. Boiling point d. Vaporizing point

21. During daytime, hot air above the land rises and is replaced by cold air from the body water. This air is called ___________a. Convection current b. Sea breezec. Land breezed. Prevailing breeze

22. A copper cube and an iron cube have the same mass and temperature. An equal quart Q of heat is removed from each cube by placing them in separate cold baths. Their temperatures were found to differ after Q was removed. This difference was caused by _______a. Better thermal conductivity of one

substance b. Difference identity c. Varying specific heat capacities d. Larger volume of one substance

23. From a candle flame, heat travels in all directions by a. Conduction b. Reflection c. Convection d. Radiation

24. The amount of heat needed to melt a unit mass of substance to its normal melting point is knows as ______a. Heat of vaporization b. Heat of fusion c. Temperature of fusion d. Heat of condensation

25. A lady holds a hand mirror one foot behind her head while standing 4 feet from a dresser mirror. How far back of the dresser mirror is the image of the flower in her hair?a. 4ft b. 5 ft c. 7 ft d. 6 ft

26. A real inverted image of an object is focused on a screen by a converging lens. If the up half of the lens is then covered, what happens to the image?a. The lower half of the image disappears b. The entire image remains and becomes

less bright c. The image does not change in any way d. The upper half of the image disappears

27. What happens when a wave encounters a slit?a. Bends and is polarizedb. Bends and is superimposedc. Bends and is diffracted d. Bends and is refracted

28. If a solar eclipse occurred 2 weeks ago, what would be the phase of the moon today?a. First quarter b. Full c. Last quarter d. New

29. If you clap your hands and hear the echo from a distant wall 0.20 s later, how far away is the wall?

a. 68 m b. 70 m c. 32 md. 34 m

30. The following illustrates the Doppler shift experiences EXCEPT___________a. Bats can detect and catch flying insects b. Detect speed of the moving heart wall in a

fetus c. Determine the direction of moving trains d. Measure speed of automobiles

31. The property of light waves that accounts for the phenomenon of color is their ______a. Velocity b. Amplitude c. Frequency d. Wavelength

32. A small electric lamp when placed at the focal point of a converging lens will produce a _______a. Diverging beam of light b. Parallel beam of light c. Converging beam of light d. Diffused beam of light

33. Which of the following quantities is a vector in character?a. Potential differenceb. Electric field c. Electric charge d. Electric energy

34. Which of the following statements about the electric field lines is FALSE?a. Field lines entering a charge of 2 q are

twice as many as field lines having a charge of +q

b. Field lines always originate from charges and end up in empty space

c. The denser the field lines are in an area, the stronger is the magnitude of the field

d. A line drawn tangent to a field line at a point gives the electric fields direction at that point

35. If an electron at a certain distance from a charged particle is attracted with a certain force, how will the force compare at twice this distance?a. Half as much b. Twicec. One fourth as much d. The same

36. Atoms which tend to give up electrons during the process of chemical combination possess _________a. negative valence b. Positive valence c. Unchanged valence d. Neutral valence

37. When a pure crystalline yellowish substance is heated in a vacuum, a greenish gas and a red powdery substance were produced. Under which of the following will you classify the yellowish substance?a. Pure substance b. Compound c. Mixture d. Element

38. When molecules of ink turn a glassful of water into blue, what process has occurreda. Diffusion b. Osmosis

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c. Solution d. Combination

39. If elements A and B combine to form AB in fixed proportion of 3:1 by weight, what happens if we try to combine 4 g of A with 1 g of B?a. AB or A react with Bb. Compound AB will not form c. 1 g of A will remain unreacted d. A compound A B will form

40. Which of the following acid groups is found in vinegar?a. Acetic acid b. Formic acid c. Ascorbic acid d. Nitric Acid

41. A group of covalently bonded atoms that acts like a singe atom when combining with other atoms is referred to as _________a. Covalent bonds b. Ionic bonds c. Polyatomic ion d. Ionic bonded atom

42. The fermentation of sugar cane, beef or corn produces a fuel material called ________a. Ether b. Ethanol c. Methane d. Methanol

43. Which of the following will have a zero dipole moment?a. H-Brb. Br-Brc. H-Fd. H-CR

44. The minimum quantity of a radioactive material that can sustain a chain reaction is called____a. Critical angle b. Chain number c. Critical massd. Atomic mass

45. Foams, emulsions and sols are heterogeneous mixtures. To what type do they belong?a. Pure solutions b. Colloidal dispersionsc. Solutionsd. Suspensions

46. In what way is sodium ion different from sodium atoms?a. The ion has more protons than the atom b. The ion has more electrons than the atom c. The ion has greater tendency to attract

positive ions than the atom d. The ion has a more stable configuration

than the atom 47. One of the symbols commonly used in writing

chemical equation is (aq). What does this symbol indicate? The substance _________a. Used is in the solid phase b. Is mixed with water vapor in the air c. Is dissolved in water d. Formed is a precipitate

48. For the isotopes O17 and C 17 with condition is true? There are _____a. 9 protons in both b. 8 protons and 9 neutrons in O17

c. 9 protons and 8 neutrons in O17

d. 9 neutrons in both

49. Which is the best way of determining the volume of an irregular object?a. Get its density b. Multiply LxWc. Displacement method d. Multiply L,W,T

50. Crude oil can be separated into gasoline, diesel, heating oil, etc. by differences in boiling points. The form of matter which would BEST describe crude oil is _________a. Homogenous mixture b. Heterogeneous mixture c. Compoundd. Mineral

51. Justin decided to test a solution using litmus paper. He noted that the red litmus paper turned blue. This observation indicates that the solution is _________a. Neutral b. Basicc. Organic d. Acidic

52. When a glass rod is rubbed with a silk cloth, some electrons are transferred from the rod to the cloth. What charge does the glass rod acquire?a. Negative b. Positive c. Undetermined d. Neutral

53. Lorraine placed some mothballs inside her cabinet. After one week, the mothballs were all gone. What happened to the mothballs?a. They were eaten by cockroaches b. They sublimated c. They were dissolved by water in the air d. They melted

54. The mercury level in a thermometer rises when dripped in hot water because heat __________a. Increases the number of molecules b. Occupies space c. Makes molecules expand d. Makes molecules move faster and farther

apart 55. A compound contains only calcium and

fluorine. A sample of the compound is determined to contain 2.00g of calcium and 1.90 of fluorine. According to the Law of Definite Proportions, how much calcium should another sample of this compound contain if it contains 2.85 of fluorine?a. 3.00 gb. 2.71 gc. 4.50 gd. 4.00 g

56. Halo-halo; heterogeneous as _____ homogeneous a. Mayonnaiseb. Marshmallow c. Vinegar d. Fog

57. Which phenomenon was defined by Antoine Bacquerel as the spontaneous disintegration of the nucleus of the atom?a. Fusion b. Fission c. Radioactivity d. Bombarding the atom

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58. The half-life of A is 10 hours while that B is 30 hours. Which statement is cORRECT?a. A decays faster than B b. None will be left after 30 hours c. B decays faster than Ad. Mass of A= Mass of B after 30 hours

59. Which statement is /are true?I. Flammability and conductivity are

chemical propertiesII. Volume and boiling point are physical

properties a. I and II are both false b. I and II are both true c. Only I is true d. Only II is true

60. The passage of a solvent through a semi permeable membrane from a solution of a lot concentration to one with higher concentrations is called a. Suspension b. Plasmolysisc. Colloidal formation d. Osmosis

61. If red blood cells are put into saline solution that is much more concentrated than the cell’s interior, the solution is said to bea. Hypertonic and the cells shrink b. Hypotonic and the cells burst c. Hypotonic and the cells shrink d. Hypertonic and the cells burst

62. The relative weight of an atom in comparison with one atom of an arbitrarily selected standard is its ________a. Molecular massb. Equivalent massc. Atomic number d. Atomic mass

63. Why is it not advisable to drink soft drinks when one is hungry?a. iT contains so much sugar b. It increases the acidity of the stomach c. It contains a stimulant, which causes

nausead. It could lessen one’s appetite

64. How many moles of C6 H6 are here in 195g of C6 H6?a. 3.5b. 4.5c. 4.5d. 2.5

65. Which property of a pure substance is similar to that of a solution?a. It is purified by chemical means b. It consist of a single phasec. It has a sharp boiling temperature d. It has a definite composition

66. The atomic bomb releases a tremendous amount of energy through a. Combination of light atoms b. Thermonuclear reaction c. Fusion d. Fission

67. In beta emission, which statement is CORRECT?a. There is no change b. Atomic number decreasesc. Atomic number increases d. Atomic mass increases

68. Jessie added one tablespoon of sugar to a mixture of instant coffee and hot water. The

resulting solution taste sweet. Which characteristic of mixture is BEST illustrated in the situation?a. The characteristics of the components re

retained in the mixture b. The mixture may be homogeneous of

heterogeneous c. The components can be mixed in any

proportion d. The components of the mixture may be

separated by ordinary physical process/es69. Which of the following illustrates a physical

change?a. Fruits ripen b. Milk turns sour c. Iron nail rusts d. Butter melts

70. An odorless, colorless liquid A boils at a temperature range of 105-110 deg C. What inference can you draw from this observation?a. Liquid A is a compound b. Liquid A is a mixture c. Liquid A is an element d. Liquid A is a pure substance

71. The ratio of oxygen atoms to hydrogen atoms in MgSO4 2H2O is _____________a. 3:2 b. 1:1c. 1:2d. 3:4

72. A study of chemical calculation of mass relationships in a chemical reaction based on balanced chemical equation is called ___________a. Scientific notation b. Scientific figures c. Stoichiometry d. Reactants

73. Filtration is BEST used in separating mixture’s that are composed of __________a. Two miscible solids b. A soluble solid in a liquid c. An insoluble solid in a liquid d. Two miscible liquids

74. Which of these mixtures can be BEST separated by paper chromatography?a. Iron fillings and sulfurb. Sugar solution c. Food coloring d. Salt solution

75. Combustion of coal can lead to acid raid formation. What type of pollutant is present in the coal?a. Phosphorusb. Sulfur c. Carbon d. Nitrogen

76. The volume of oil, which is stored in a glass, is 250 ml. If the oil will be transferred into a 400 ml container, what will be its volume?a. 250 ml b. 400 ml c. 600 ml d. 150 ml

77. What temperature reading in Fahrenheit equivalent to 78 degree Celsius?a. 173 degrees Fahrenheit b. 171 degrees Fahrenheit c. 172 degrees Fahrenheit d. 170 degrees Fahrenheit

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78. What is true of different substances having equal number of mole?a. The same amount of energy b. Equal volumes per unit massc. Equal massesd. Equal number of particles

79. Which atomic particle determines the isotope of an element a. Proton b. Neutron c. Electron d. Position

80. Which widely accepted theory of the origin of the solar system is in agreement with today’s findings?a. Nebular b. Dust-cloud c. Planetessimal d. Exploding star

81. What terms refer to distance north-south and east –west of the equator, respectively?a. Altitude, latitude b. Longitude, latitudec. Latitude, longituded. Magnitude; longitude

82. What term is used to indicate the amount of water vapor actually present in the air at a given time?a. Atmospheric humidity b. Absolute humidityc. Atmospheric moisture d. Relative humidity

83. Shuttle space vehicles can orbit the earth and can take off and land like an airplane. One such space vehicle is __________a. Sputnik 1b. Columbia c. Apollo IId. Vostok 2

84. Because of the earth’s rotation, which do we experiencea. Seasons b. Year 2004-2005 c. Night and day d. Rainy and hot days

85. Vibrations of the earth are produced by rapid release of energy and are radiated in all directions from a source calleda. Foreshock b. Focus c. epicenterd. node

86. What do we call the intermittent hot springs which eject columns of water with great force at certain intervals?a. Geysers b. Spoutc. hot springd. aquifer

87. What mechanical and chemical processes ________ the hardest rock to break down into smaller particles?a. Burrowing animals, growing toolsb. Disintegration, oxidation c. Carbonation, oxidation d. Hydration, solution

88. Which of the following is TRUE about the water table?a. It can be found below the zone of

saturation

b. It runs trough in a straight horizontal linec. It roughly follows the shape of the land

surfaced. Its location is not so important in making a

well 89. As the earth revolves around the sun, it may

reach a point when it is directly between the sun and the moon. When that happens what kind of eclipse occurs?a. Total solar b. Partial solar c. Lunar d. Solar

90. What elements are found in the core of the earth?a. Nickel and silicon b. Iron and nickelc. Iron and calcite d. Silicon and iron

91. The “eye” of a storm is an area characterized by a. Varied atmospheric pressure b. Average atmospheric pressure c. Low atmospheric pressure d. Extremely high pressure

92. Which of the following best describes of soil?a. Weathered rocks, which include decayed

matter called humusb. Bedrocks that have undergone weathering c. Small rock particlesd. Composed of decayed matter

93. How long does it take the moon to complete one revolution?a. 29 days b. 27 1/3 days c. 30 days d. 31 days

94. During the months of July. August and September which prevailing wind system is experienced in the Philippines?a. Trade winds b. Easterly winds c. Northeast Monsoon d. Southwest Monsoon

95. Which of the following is an important factor in explaining why seasons occur on earth?a. The sun’s axis in tilted b. Earth’s rotates on its axis c. Earth’s axis is tilted d. The sun rotates on its axis

96. We experience great seismic activities because we are located in the ______a. Continental crust b. Pacific trench c. Fault beltd. Circum pacific belt

97. Which is the softest and hardest mineral in the correct order?a. Talc; gypsum b. Calcite; diamond c. Gypsum; corundum d. Talc, diamond

98. Why do we see the sun rise in the east a. On the globe, we are located in the east b. The earth rotates from the west to east c. The earth revolve eastward d. We are located in the 20th meridian

99. Why type of tide occurs during full moon and new moon?a. Neap

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b. Lunar c. Spring d. Solar

100. Who was the first man to land on the moon?a. Yuri Gagarin b. Neil Armstrong c. Mike Collinsd. John Glenn

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