Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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A company
wants to make its product more easily recognizable to consumers. What might the company do to
accomplish this goal? a. | Work with its competitors | c. | Create a new product | b. | Design a
logo | d. | Increase its research
budget | | | | |
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2.
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Which
of the following is NOT true about a wave? a. | Its energy increases as its amplitude
increases. | b. | Its frequency increases as its wavelength
decreases. | c. | Its velocity is equal to its frequency times its
wavelength. | d. | It moves the molecules of the medium from the point of
disturbance to the point where all the energy of the disturbance is used
up. | | |
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3.
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The
reflection of waves from a surface follows which of the following rules? a. | None of the
energy carried by the wave is reflected. | b. | The angle of incidence is always normal to the
surface. | c. | The angle of incidence is equal to the angle of
reflection. | d. | Only light waves polarized in the horizontal direction are
reflected. | | |
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4.
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When
a tuning fork is struck by a mallet, the tuning fork vibrates ____. a. | as a standing
wave | b. | at its natural
frequency of vibration | c. | until it falls apart | d. | at different
frequencies depending on how it is struck | | |
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5.
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A
hockey puck gradually slows to a stop as it slides across an ice rink. Which of the following energy
transformations occurs? a. | KE ® chemical PE | c. | KE ® elastic PE | b. | KE
®
GPE | d. | KE
® thermal
energy | | | | |
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6.
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Using
the art above, human body temperature is approximately 310 K. What is human body temperature in
C°? a. | 0°C | c. | 37°C | b. | 20°C | d. | 98.6°C | | | | |
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7.
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When a
scientist compares two objects or events, what is he or she looking for? a. | differences | c. | similarities | b. | causes and effects | d. | errors | | | | |
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8.
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What
is the function of a battery or power supply in an electric circuit? a. | It provides a
voltage difference. | c. | It lowers the
current. | b. | It measures combined
resistance. | d. | It decreases
resistance. | | | | |
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9.
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An
electric current is generally a flow of these subatomic particles. a. | protons | c. | electrons | b. | neutrons | d. | nuclei | | | | |
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10.
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Why
are most household circuits parallel, rather than series? a. | Parallel
circuits allow some lights and appliances to be used when others are off. | b. | Parallel
circuits carry less current than series circuits. | c. | Parallel
circuits allow no lights and appliances to be used when others are off. | d. | Parallel
circuits don’t require fuses or circuit breakers. | | |
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Use the data in the table below to make a graph of resistance in microohms on the y-axis vs. temperature in oC on the x-axis.
Copper Wire Resistance
Resistance in Microohms | Temperature
(oC) | 2.00 | 50.0 | 2.31 | 100.0 | 3.73 | 300.0 | 4.44 | 400.0 | 5.00 | 475.0 | | |
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11.
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What
is the approximate resistance of the wire at 200oC ? a. | 2.85
microohms | c. | 3.19
microohms | b. | 3.01 microohms | d. | 3.42 microohms | | | | |
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12.
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Using
information in the art as reference, how much calcium is found in a person who has a mass of 60
kg? a. | 1.2
kg | c. | 12
kg | b. | 1.8
kg | d. | 60
kg | | | | |
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13.
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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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14.
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Which
of the following statements is NOT true regarding the conservation of mass? a. | Mass is
conserved in chemical reactions. | b. | Some mass in a chemical reaction is converted to
energy. | c. | The total mass of the reactants equals the total mass of the
products. | d. | The total number of each type of atom in the reactants equals
the total number of each type of atom in the products. | | |
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15.
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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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16.
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A
certain molecular solid dissolves readily in water. What type of substance must the solid
be? a. | Pure
covalent | c. | Ionic | b. | Polar covalent | d. | Either type of covalent compound | | | | |
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17.
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The
pH of an HC2H3O2 solution is 4. What is a possible pH of an HCl
solution of the same concentration?
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18.
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A
scientist conducts an experiment and concludes that the water in a pond is acidic. What should the
next step in the experiment be? a. | Repeat the experiment | b. | Conclude that
all ponds in the area are acidic | c. | Start taking measures to reduce the acidity of the
pond | d. | Disregard the
results and run the experiment again | | |
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19.
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Because of the conservation of momentum, if you jump off a skateboard, what happens to
its velocity? a. | Reverses | c. | Increases | b. | Decreases | d. | Stops | | | | |
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20.
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If
you lift weights faster than normal, you have increased what? a. | Force | c. | Distance | b. | Power | d. | Work | | | | |
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21.
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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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22.
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If a
worker applies an effort force of 15 N to pry open a wooden crate that has a resistance force of 450
N, what is the mechanical advantage of the crowbar?
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23.
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What
is the efficiency of this machine if its MA = 3 and its IMA = 4?
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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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You
have a piece of solid metal and you want to observe how convection occurs in it. What should you do
to the metal so that you can observe convection? a. | pound it out into a long flat
shape | c. | melt it and
bring it to a boil | b. | cool it down | d. | cut it into small pieces | | | | |
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