Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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The table
shows data gathered by a company in a study that compared its product, a cough medicine, to its
competitors’ products.
| | Period of Effectiveness | Brand A | 6
hr | Brand
B | 12 hr | Brand C | 4
hr | Brand
D | 8 hr | | |
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1.
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Based on the
information in the table, what variable did the study test? a. | The names of the
medicines | c. | How long the medicines
lasted | b. | The taste of the medicines | d. | How quickly the medicines took effect | | | | |
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2.
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You design
an experiment to test the claim in the ad. What would be the first step of your
experiment? a. | Analyzing
data | c. | Forming a
hypothesis | b. | Identifying variables | d. | Drawing a conclusion | | | | |
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3.
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If
the problem you wanted to solve involved determining the composition of a specific star, which of the
following would you least likely use to gather information about the problem? a. | encyclopedias | c. | textbooks | b. | newspapers | d. | the Internet | | | | |
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4.
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What
property of a wave is represented by Y in the diagram? a. | frequency | c. | wavelength | b. | speed | d. | amplitude | | | | |
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5.
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Which
of the following is NOT true about two compressional waves that meet and are in
phase? a. | The rarefactions
of one wave overlap the rarefactions of the other and the compressions of one wave overlap the
compressions of the other. | b. | The amplitude of the combined wave is greater than the
amplitudes of the original waves. | c. | The rarefactions of one wave overlap the compressions of the
other and the compressions of one wave overlap the rarefactions of the
other. | d. | If the two waves are sound waves, they will produce a louder
sound. | | |
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6.
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Polarized sunglasses are useful because ____. a. | they are dark
and don’t allow as much light to come through | b. | they reflect
much of the light from their surfaces | c. | they filter out the horizontal transverse waves present in
light and allow vertical waves only to get to the eyes | d. | They diffract
and refract light | | |
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7.
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A
small amount of mass is transformed into energy when ____. a. | gasoline burns
in a car engine | b. | a nuclear power plant produces
electricity | c. | your body digests a candy bar | d. | an electric
heater warms a room | | |
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8.
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A
bowling ball rolls at a speed of 2.0 m/s and has kinetic energy of 12.0 J. What is the kinetic energy
of the bowling ball when its speed is 1.0 m/s? a. | 3.0 J | c. | 12.0 J | b. | 6.0
J | d. | 24.0
J | | | | |
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9.
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Using
the art above, what is the predicted worldwide oil production in the year 2050? a. | 6 billion
barrels | c. | 2 billion
barrels | b. | 12 billion barrels | d. | 14 billion barrels | | | | |
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10.
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What
is the function of the control rods in the reactor core of a nuclear power plant? a. | prevent some
neutrons from striking other U-235 nuclei. | b. | increase the number of neutrons striking other U-235
nuclei. | c. | prevent the chain reaction from
occurring. | d. | double the number of neutrons released by splitting U-235
nuclei. | | |
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11.
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Because of what takes place in forming this compound, shown in the figure, where would
you expect the atoms involved to be located on the periodic table? a. | Groups 1A and 7A
because equal numbers of electrons are gained and lost. | b. | Group 2A because
two electrons are lost by one atom, and Group 7A because one electron is gained by each of two
atoms. | c. | Group 2A because two electrons are gained by one atom, and
Group 7A because one electron is lost by each of two atoms. | d. | Group 8A because
all atoms end up with eight electrons in their outer energy levels. | | |
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12.
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Which
of the following changes involved in manufacturing an automobile is a chemical
change? a. | applying paint
to the body of the automobile | b. | making plastics from petroleum
products | c. | making steel from iron, carbon, and other
metals | d. | rolling out steel into sheets | | |
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13.
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If a
marble with a mass of 0.03 kg, a baseball with mass of 0.4 kg, and a bowling ball with a mass of 6.3
kg are dropped at the same time from a height of 10 m above the surface of Earth, which will hit the
ground first? a. | Baseball | c. | Bowling
ball | b. | They will hit at
the same time. | d. | Marble | | | | |
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14.
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You
are a passenger in a vehicle which stops suddenly. According to Newton’s first law, how will
your body behave if you are NOT wearing a safety belt? a. | It will stop
with the vehicle. | c. | It will move
suddenly backward. | b. | It will continue to move straight
ahead. | d. | It will tend to
move to one side. | | | | |
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Mass of Reactants | Mass of Products | 223.4 g Fe + 96.0 g O2 | ? g Fe2O3 | 44.0 g C3H8 + 160.0 g O2 | 132.0 g CO2 + ? g H2O | ? NH4NO3 | 11.2 g H2O + 13.8 g N2O | | |
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15.
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What
mass of Fe2O3 is produced in the reaction shown in the first equation in the
table? a. | 127.4
g | c. | 319.4
g | b. | 223.4
g | d. | 590.8
g | | | | |
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16.
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A log
burns in a fireplace. The large log leaves a handful of ashes. Which of the following statements best
explains the difference in mass of the log and the ashes? a. | Mass was
destroyed during the reaction. | b. | Mass was not lost because the density of the ashes is greater
than the density of the log. | c. | The difference in mass was converted to released
energy. | d. | The mass of the log and oxygen equals the mass of the ash and
product gases. | | |
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17.
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Which
of the following equations shows conservation of mass? a. | 2K2CrO4 + Pb(NO3)2 ®
2KNO3 + PbCrO4 | b. | 2K2CrO4 + Pb(NO3)2
® KNO3
+ PbCrO4 | c. | K2CrO4 + Pb(NO3)2
®
2KNO3 + PbCrO4 | d. | K2CrO4 + Pb(NO3)2
® KNO3
+ PbCrO4 | | |
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18.
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The
ionic compound KBr is dissolved in water. What particle will be surrounded by the positively charged
portions of water molecules in solution? a. | K+ | c. | A KBr crystal | b. | Br- | d. | A KBr
molecule | | | | |
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19.
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BaSO4 is an ionic solid. What part of the water molecule will be attracted
to the SO42- ions in solution? a. | The positive part, H | c. | The positive part, O | b. | The negative
part, H | d. | The negative
part, O | | | | |
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20.
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Freezing point decreases as the number of particles dissolved in the solution
increases. Which of the following compounds would be most effective in melting ice on the
road? a. | BaCl2 | c. | KCl | b. | C12H22O11 | d. | NaBr | | | | |
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21.
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Which
of the following statements is true regarding the effect of thermal pollution on the organisms living
in a lake? a. | More dissolved
oxygen will be present because an increase in temperature will increase the solubility of oxygen in
the water. | b. | The lake will be able to support more organisms because
organisms grow better in warm water. | c. | The water in the warmer lake will contain less dissolved
oxygen, so fewer organisms that require oxygen will be able to live there. | d. | Thermal
pollution has no effect on the organisms involved. | | |
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22.
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How
is speed affected by this machine? a. | Increases | c. | Stays the same | b. | Decreases | d. | Increases, then
decreases | | | | |
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23.
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Which
simple machine is part of your knee? a. | Wedge | c. | Wheel and axle | b. | Inclined
plane | d. | Lever | | | | |
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24.
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In
the figure, what happens to the radiation at the point labeled “A”? a. | It is absorbed
by the atmosphere. | c. | It is reflected
by the atmosphere. | b. | It is absorbed by Earth’s
surface. | d. | It is reflected
by Earth’s surface. | | | | |
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25.
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What
happens to the radiation at the point labeled “B”? a. | It is reflected
by the atmosphere. | c. | It is reflected
by Earth’s surface. | b. | It is absorbed by the
atmosphere. | d. | It is absorbed
by Earth’s surface. | | | | |
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