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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Which
of the following is an example of a balanced force? a. | a baby pushed in
a stroller on a sidewalk | b. | a child running down a path | c. | a car traveling
on a highway | d. | a porch swing hanging from the porch
roof | | |
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2.
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Which
of the following are two factors that determine speed? a. | acceleration and
time | c. | distance and
time | b. | velocity and
time | d. | motion and
time | | | | |
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3.
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Which
of the following best represents acceleration as presented on a graph? a. | motion change
vs. time | c. | speed change vs.
time | b. | distance change
vs. time | d. | velocity change
vs. time | | | | |
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4.
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When
the net forces equal 0 N, they are which of the following? a. | balanced | c. | a
push | b. | unbalanced | d. | a
pull | | | | |
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5.
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Which
of the following causes an object to start moving? a. | balanced
forces | c. | either balanced
or unbalanced forces | b. | unbalanced forces | d. | any combination of forces | | | | |
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6.
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What
is a force that opposes motion between two surfaces that are in contact? a. | friction | c. | velocity | b. | motion | d. | acceleration | | | | |
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7.
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In
which of the following activities is friction harmful? a. | brakes stopping
a car | c. | an eraser
erasing | b. | a person walking | d. | car engine parts wearing out | | | | |
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8.
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Which
is NOT a way to reduce friction? a. | using ball bearings | c. | pouring sand on ice | b. | sanding with
paper | d. | lubricating with
oil | | | | |
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9.
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Which
of the following does NOT describe mass? a. | remains constant | c. | is a measure of gravitational force | b. | is a measure of
matter | d. | is measured in
kilograms | | | | |
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10.
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Which
of the following does NOT describe weight? a. | changes as gravitational force
changes | c. | is a measure of
gravitational force | b. | is constant | d. | can be measured in newtons | | | | |
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11.
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To
calculate an object’s acceleration, you need to know a. | distance
traveled and speed. | b. | starting point, endpoint, and the object’s
mass. | c. | starting velocity, final velocity, and time it takes to change
velocity. | d. | average speed and distance. | | |
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12.
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A
hiker’s velocity begins at 1.8 m/s uphill and changes to 1.5 m/s uphill. How do you know that
the hiker has a negative acceleration? a. | His direction changed. | c. | His speed increased. | b. | His direction
was unchanged. | d. | His speed
decreased. | | | | |
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13.
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A
student has a weight of 420 N on Earth. What is the student’s weight on the moon. (Moon’s
gravity = 1/6 of Earth’s gravity). a. | 70 N | c. | 70 kg | b. | 2520
N | d. | 2520
kg | | | | |
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14.
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An
unbalanced force can cause an object’s motion to change by a. | changing
direction or speed; starting but not stopping motion | b. | changing
direction or speed, starting or stopping motion. | c. | changing
direction or speed; stopping but not starting motion | d. | changing
direction or speed only. | | |
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15.
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Two
forces act on an object. One force has a magnitude of 10 N and is directed toward the north. The
other has a magnitude of 5 N directed toward the south. The object experiences a net force
of a. | 5 N
south. | c. | 50 N
north. | b. | 15 N north. | d. | 5 N north. | | | | |
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16.
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What
is the SI unit for speed? a. | kilogram | c. | m/s | b. | newton | d. | m/s/s | | | | |
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17.
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If a
baseball and a cannonball are dropped from the same height at the same time, which ball will hit the
ground first? a. | the
cannonball | c. | The balls land
at the same time. | b. | the baseball | d. | the ball with the larger volume | | | | |
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18.
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Which
is a common unbalanced force acting on objects in motion? a. | inertia | c. | friction | b. | acceleration | d. | speed | | | | |
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19.
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If a
moving boxcar gently collides with a boxcar at rest and the two boxcars move together, their combined
momentum will be a. | greater than the
original momentum of the moving boxcar. | b. | equal to the original momentum of the moving
boxcar. | c. | less than the original momentum of the moving
boxcar. | d. | zero. | | |
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20.
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Which
of the following is NOT an example of projectile motion? a. | the path of a
leaping frog | b. | the path of an arrow through the air | c. | the path of a
crate sliding along flat ground | d. | the path of a pitched baseball | | |
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21.
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If a
tennis ball, a solid rubber ball, and a solid steel ball were dropped at the same time from the same
height, which would hit the ground first? (Assume there is no air resistance.) a. | All would hit at
the same time. | b. | The solid rubber ball would hit
first. | c. | The solid steel ball would hit first. | d. | The tennis ball
would hit first. | | |
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22.
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Which
of the following objects has the least acceleration? a. | an empty
shopping cart pushed with a hard force | b. | a full shopping cart pushed with a hard
force | c. | an empty shopping cart pushed with a light
force | d. | a full shopping cart pushed with a light
force | | |
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23.
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A cue
ball rolls toward a billiard ball with a velocity of 1.0 m/s east. Both balls have identical masses.
What happens to the total momentum after the two balls collide? a. | It is greater
than the original momentum of the cue ball. | b. | It is equal to
the momentum before the collision. | c. | It is less than the original momentum of the
cueball. | d. | It is equal to zero. | | |
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24.
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A
spacecraft orbiting Earth is both moving forward and a. | at terminal
velocity. | c. | experiencing
resistance. | b. | in free fall. | d. | weightless. | | | | |
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25.
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Newton’s first law of motion states that a moving object, unless it is acted on
by an unbalanced force, will a. | remain in motion. | c. | change its momentum. | b. | eventually come
to a stop. | d. | accelerate. | | | | |
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26.
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A
book weighs 6.0 N. If the acceleration of gravity is 9.8 m/s2, what is the mass of the
book in kilograms? a. | 6.1 kg | c. | 1.6 kg | b. | 59
kg | d. | 0.61
kg | | | | |
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27.
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Which
cart will accelerate the least? a. | an empty cart pushed with a hard
force | b. | a full cart pushed with a hard force | c. | an empty cart
pushed with a light force | d. | a full cart pushed with a light force | | |
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28.
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What
is true when all objects collide? a. | The velocity of each object does not
change. | b. | The objects always stick together. | c. | The objects
always bounce off each other. | d. | The total momentum does not change. | | |
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29.
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A
pitched baseball gets its horizontal motion from a. | the force of gravity. | c. | air resistance. | b. | the force of the
hand throwing it. | d. | projectile
motion. | | | | |
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30.
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What
is the SI unit for pressure? a. | drag | c. | pascal | b. | bernoulli | d. | archimedes | | | | |
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31.
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What
does NOT affect an airplane’s lift? a. | turbulence | c. | wing size | b. | air
quality | d. | speed | | | | |
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32.
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Why
do air bubbles in water rise to the surface? a. | Liquids cannot be compressed very
much. | b. | Water is about 1,000 times denser than
air. | c. | Pressure is the
amount of force exerted on a given area. | d. | The weight of the atmosphere pushes down on the
water. | | |
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33.
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Because fluid pressure is exerted evenly in all directions a. | some objects
float. | c. | bubbles are
round. | b. | birds and airplanes can fly. | d. | objects seem to weigh less in water. | | | | |
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34.
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Which
of the following does NOT affect the amount of lift on an airplane’s wing? a. | turbulence | c. | wing surface
area | b. | gravity | d. | the
airplane’s speed | | | | |
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35.
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If a
fluid flows from area A to area B, then area B must be an area of lower a. | temperature. | c. | volume. | b. | mass. | d. | pressure. | | | | |
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36.
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Why
would a pilot adjust a plane’s wing flaps? a. | to reduce cabin pressure | c. | to reduce drag | b. | to increase
drag | d. | to increase
cabin pressure | | | | |
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37.
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Why
would a 1 cm3 piece of balsa wood be more buoyant than a 1 cm3 piece of
oak? a. | Balsa has more
mass per unit volume. | b. | Oak is more dense. | c. | Balsa is
stronger. | d. | Oak is less dense. | | |
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38.
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What
is the number of times the machine multiplies force? a. | power | c. | mechanical
efficiency | b. | output force | d. | mechanical advantage | | | | |
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39.
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If a
barbell weighs 160 N, what other information do you need to calculate how much work it takes to lift
it? a. | the shape of the
weights | b. | how high the barbell is being lifted | c. | the strength of
the person doing the lifting | d. | the amount of output force | | |
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40.
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How
does a ramp make lifting a heavy object easier? a. | The object is moved over a shorter
distance. | b. | The ramp increases the amount of work you
do. | c. | Less force is
needed to move the object over a longer distance. | d. | More force is
needed to move the object over a longer distance. | | |
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41.
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Where
is the input force of a wheel and axle exerted? a. | a circular distance | c. | an inclined plane | b. | a rectangular
distance | d. | a
spiral | | | | |
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42.
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What
two things must happen for work to be done? a. | The object must move and there must be an output
force. | b. | The object must move in the opposite direction of the
force. | c. | The object must move in the same direction as the
force. | d. | The object must move and the mechanical advantage must be
greater than 1. | | |
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43.
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What
is the rate at which power is transferred? a. | power | c. | work | b. | energy | d. | joule | | | | |
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44.
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What
is a machine with a grooved wheel that holds a cable? a. | lever | c. | wheel and
axle | b. | pulley | d. | wedge | | | | |
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45.
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A
doorknob is an example of a a. | pulley | c. | lever | b. | wheel and
axle | d. | screw | | | | |
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46.
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Which
type of energy makes a light bulb feel warm? a. | light energy | c. | thermal energy | b. | electrical
energy | d. | nuclear
energy | | | | |
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47.
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When
a bat hits a baseball, what is transferred from the bat to the ball? a. | work | c. | force | b. | energy | d. | electrical energy | | | | |
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48.
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What
happens when electrical energy is changed to thermal energy? a. | An energy change
takes place. | c. | An energy
conversion takes place. | b. | A force change takes place. | d. | An electrical conversion takes place. | | | | |
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49.
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When
you eat fruits and vegetables, what type of energy are you taking in? a. | thermal | c. | electrical | b. | sound | d. | chemical | | | | |
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50.
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Any
time an energy conversion takes place, some of the original energy is converted to which one of the
following? a. | sound | c. | light | b. | potential | d. | thermal | | | | |
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51.
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Which
of the following is not an energy resource? a. | falling water | c. | the heat inside Earth | b. | plant
matter | d. | an electric
generator | | | | |
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52.
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What
is the ability to do work? a. | movement | c. | power | b. | energy | d. | force | | | | |
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53.
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What
do you call the energy of motion? a. | potential energy | c. | kinetic energy | b. | mechanical
energy | d. | force
energy | | | | |
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54.
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Railroad tracks have gaps between the rails so that they will not buckle in hot
weather because of a. | thermal conductivity. | c. | thermal expansion. | b. | specific
heat. | d. | thermal
insulation. | | | | |
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55.
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Which
of the following is NOT a common state of matter? a. | solid | c. | gas | b. | liquid | d. | superfluid | | | | |
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56.
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In
both hot-water and solar-heating systems, the thermal energy from heated water circulates through the
air of a room by a. | conduction. | c. | convection. | b. | ventilation. | d. | radiation. | | | | |
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57.
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In
which way does the operation of a refrigerator differ from that of a heat engine? a. | A refrigerator
uses heat to do work, while a heat engine does work to transfer energy by
heat. | b. | A heat engine uses heat to do work, while a refrigerator does
work to transfer energy by heat. | c. | A heat engine absorbs energy, while a refrigerator releases
it. | d. | There is no
difference in the operation of the two machines. | | |
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58.
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The
lowest possible temperature is a. | 273 K. | c. | 0°C. | b. | 0°F. | d. | 0
K. | | | | |
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59.
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Which
value represents the greatest amount of energy? a. | 1,000 cal | c. | 100 kcal | b. | 500
Cal | d. | 100,000
J | | | | |
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60.
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Thermal pollution affects nearby bodies of water by dumping a. | burning
garbage. | c. | heated
chemicals. | b. | radioactive materials. | d. | heated water. | | | | |
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61.
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If
two substances have the same temperature, then a. | their particles have the same average kinetic
energy. | b. | their particles will not react
chemically. | c. | the substances have equal thermal
energies. | d. | their specific heats are identical. | | |
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62.
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In
which state do particles move fastest and with little effect on each other? a. | ice | c. | liquid | b. | gas | d. | solid | | | | |
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63.
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Why
do the condenser coils in back of a refrigerator feel warm? a. | Warm air
collects behind the refrigerator. | b. | Coils are always warm. | c. | Thermal energy
is brought from the outside. | d. | Thermal energy is removed from
inside. | | |
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64.
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What
happens when liquid in a thermometer undergoes thermal expansion? a. | Its volume
decreases. | c. | Its particles
get colder. | b. | Its particles spread out. | d. | Its particles expand. | | | | |
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65.
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An
example of the thermal expansion of a solid is a. | an expansion joint in a bridge. | c. | the mercury in a thermometer. | b. | a stretched
rubber band. | d. | a balloon
inflated by hot air. | | | | |
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66.
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A
heating system that relies on a building’s structural design and materials and sunlight for
heating is called a(n) a. | passive solar-heating system. | c. | hot-water heating system. | b. | active
solar-heating system. | d. | warm-air heating
system. | | | | |
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67.
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Which
is the most penetrating form of nuclear radiation? a. | gamma
rays | c. | alpha
particles | b. | X rays | d. | beta particles | | | | |
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68.
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Becquerel was shocked by his results when the photographic plate from the drawer was
developed because a. | he did not know
you can get shocks from electricity. | b. | he did not expect the mineral to glow without a
light. | c. | he did not know the energy came from
uranium. | d. | he forgot he had put his material in the
drawer. | | |
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69.
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What
name did Marie Curie give to the process where some nuclei give off nuclear
radiation? a. | X
rays | c. | fluorescent
radiation | b. | electron radiation | d. | radioactivity | | | | |
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70.
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What
happens to an unstable nucleus during radioactive decay? a. | The nucleus
gives off particles and energy. | b. | The nucleus absorbs particles and
energy. | c. | The nucleus gives off particles and
light. | d. | The nucleus absorbs particles and X
rays. | | |
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71.
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Which
of the following can only be stopped by lead or concrete? a. | alpha
particles | c. | positrons | b. | gamma rays | d. | beta particles | | | | |
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72.
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A
large nucleus splitting into two smaller nuclei gives off a. | isotopes. | c. | energy. | b. | alpha particles. | d. | nuclear fission. | | | | |
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73.
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When
light shines on fluorescent materials, what happens? a. | The materials
explode. | b. | The materials break into particles. | c. | The materials
glow. | d. | The materials give off gases. | | |
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74.
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Which
of the following can cause the most damage from inside a living thing? a. | gamma
rays | c. | beta
particles | b. | alpha particles | d. | gamma particles | | | | |
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75.
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What
is the time it takes one-half of the nuclei of a radioactive isotope to decay
called? a. | half-life | c. | isotope
life | b. | carbon-14 | d. | radioactivity | | | | |
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76.
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What
is an example of a controlled nuclear chain reaction? a. | a nuclear power
plant | c. | an atomic
bomb | b. | a nuclear
tracer | d. | an atomic
bond | | | | |
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77.
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What
is a disadvantage of nuclear power plants over fossil fuel plants? a. | they cost more
to build | c. | the supply of
uranium is unlimited | b. | they cost less to run | d. | they cost less to build | | | | |
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78.
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Which
event is most similar to a nuclear chain reaction? a. | A river
overflows its banks. | b. | An avalanche rolls down a mountain. | c. | A volcano
erupts. | d. | A hurricane forms. | | |
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79.
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What
is the loss of static electricity as charges move off an object? a. | static | c. | friction | b. | electric discharge | d. | induction | | | | |
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80.
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What
do you call materials with a resistance of 0 W? a. | conductors | c. | resistors | b. | superconductors | d. | photocells | | | | |
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81.
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What
generates electrical energy from chemical energy? a. | cell | c. | circuit | b. | switch | d. | current | | | | |
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82.
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What
is the third part of an electric circuit besides the wires and the load? a. | force | c. | current | b. | voltage | d. | energy source | | | | |
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83.
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What
is a switch that automatically opens if the current is too high? a. | fuse | c. | circuit
breaker | b. | conductor | d. | insulator | | | | |
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84.
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Which
of these would lower the electrical resistance of a wire? a. | making the wire
thinner | b. | increasing the wire’s length | c. | lowering the
temperature of the wire | d. | using denser material for the wire | | |
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85.
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What
does the amount of energy released per charge depend upon? a. | voltage | c. | current | b. | resistance | d. | friction | | | | |
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86.
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What
strengthens a magnetic field made by a current-carrying wire? a. | solenoid and
electric current | b. | electromagnet and electric motor | c. | electromagnet
and solenoid | d. | only an electromagnet | | |
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87.
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A
compass needle responds to a magnetic field, because the compass needle is a a. | transformer. | c. | motor. | b. | generator. | d. | magnet. | | | | |
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88.
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What
is created when a magnet moves through a coil of wire? a. | an electric
current | c. | a
solenoid | b. | an electromagnet | d. | a ferromagnet | | | | |
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89.
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What
did Faraday’s experiments with magnets and electromagnetic induction
demonstrate? a. | Strong
electromagnets make electric current. | b. | Electric current is made when the magnetic field
changes. | c. | Strong electric current makes
electromagnets. | d. | Magnetic fields are made when the electric field
changes. | | |
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90.
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Which
of the following is NOT true about an electromagnet? a. | It can be strong
enough to levitate a train. | b. | The current may be turned on or off. | c. | Its strength is
reduced by adding more loops per meter. | d. | It consists of an iron core and a current-carrying
wire. | | |
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91.
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When
domains of atoms line up, what do they create? a. | an electric current | c. | an aurora | b. | a magnetic
field | d. | a
ferromagnet | | | | |
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92.
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What
do spinning electric charges generate? a. | a magnetic force | c. | an electromagnet | b. | a
ferromagnet | d. | an
aurora | | | | |
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93.
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Which
statement is NOT true about semiconductors? a. | Semiconductors conduct electric current better than
insulators. | b. | Semiconductors have slowed the pace of
technology. | c. | Semiconductors do not conduct electric current as well as
conductors. | d. | Semiconductors are the backbone of most electronic
devices. | | |
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94.
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Which
statement describes an integrated circuit? a. | It has one transistor and many silicon
chips. | b. | It operates at a very slow speed. | c. | It has helped
reduce the size of electronic devices. | d. | It requires electric charges to travel long
distances. | | |
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95.
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Which
of the following is NOT true about semiconductors? a. | They conduct
electric current better than insulators do. | b. | They only use
silicon. | c. | They do not conduct electric current as well as conductors
do. | d. | They are the
backbone of most electronic devices. | | |
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96.
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What
job is done by circuit boards? a. | They connect electronic
devices. | c. | They change TV
channels. | b. | They receive signals from a TV. | d. | They connect circuit parts. | | | | |
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97.
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What
kind of carriers are used to broadcast television audio and video signals? a. | laser
signals | c. | electromagnetic
waves | b. | electron beams | d. | fluorescent waves | | | | |
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98.
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When
two objects, such as marimba bars and columns, vibrate at the same frequency, this
occurs. a. | refraction | c. | resonance | b. | reflection | d. | amplitude | | | | |
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99.
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An
echo is the result of a a. | reflected sound wave. | c. | refracted sound wave. | b. | diffracted sound
wave. | d. | dispersed sound
wave. | | | | |
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100.
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Which
one of these wave types must have a medium? a. | X-rays | c. | ocean waves | b. | visible
light | d. | microwaves | | | | |
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101.
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What
is a reflected sound wave called? a. | transmittal | c. | echo | b. | interaction | d. | return | | | | |
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102.
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The
amplitude of a sound’s waves determines the sound’s a. | pitch. | c. | resonance. | b. | loudness. | d. | sound quality. | | | | |
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103.
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The
frequency of a sound wave determines a. | the pitch of the sound. | c. | the sound quality. | b. | the loudness of
the sound. | d. | the type of
interference. | | | | |
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104.
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For a
sound wave to produce an echo, it must a. | diffract around a small barrier. | b. | reflect off the
surface of an object. | c. | have an ultrasonic frequency. | d. | have a very long
wavelength. | | |
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105.
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What
does the amplitude of a sound’s waves affect? a. | pitch | c. | resonance | b. | loudness | d. | sound quality | | | | |
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106.
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What
does the motion of the source of a sound cause? a. | resonance | c. | the Doppler effect | b. | shock
waves | d. | echolocation | | | | |
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107.
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What
does the medium through which sound waves travel affect? a. | speed of the
sound | c. | number of waves
per second | b. | amplitude of the waves | d. | sound quality | | | | |
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108.
|
Which
of the following represents the correct sequence of events? a. | a drum vibrates;
air particles near a drum are pushed closer together and then become less crowded; compressions and
rarefactions travel away from a drum; hair cells in the cochlea bend; the hammer
vibrates | b. | hair cells in the cochlea bend; the hammer vibrates; a drum
vibrates; air particles near a drum are pushed closer together and then become less crowded;
compressions and rarefactions travel away from a drum | c. | air particles
near a drum are pushed closer together and then become less crowded; compressions and rarefactions
travel away from a drum; a drum vibrates; hair cells in the cochlea bend; the hammer
vibrates | d. | a drum vibrates; air particles near a drum are pushed closer
together and then become less crowded; compressions and rarefactions travel away from the drum; the
hammer vibrates; hair cells in the cochlea bend | | |
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109.
|
In
which situation does a pilot have to travel the fastest in order to break the sound
barrier? a. | at 4000 m above
sea level | c. | in outer
space | b. | at 12,000 m above sea level | d. | at the edge of the shock wave | | | | |
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110.
|
Which
of the following people is most likely to suffer from tinnitus? a. | an elderly
person | c. | a young
child | b. | a former rock star | d. | a worker in a quiet office | | | | |
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111.
|
Which
sound has the highest pitch? a. | one with 156 Hz | c. | one with 14 dB | b. | one with 258
Hz | d. | one with 563
dB | | | | |
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112.
|
Which
of the following could NOT be considered a percussion instrument? a. | two sticks being
knocked together | b. | a piece of grass held between the thumbs and blown
on | c. | wind chimes
blowing in the wind | d. | an oatmeal container filled with beans and
shaken | | |
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113.
|
An
electromagnetic wave a. | never moves. | b. | can travel only
through empty space. | c. | cannot travel through matter. | d. | can travel
through empty space or matter. | | |
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114.
|
The
electromagnetic spectrum is the entire range of a. | colors of visible light. | c. | gamma rays and X rays. | b. | ultraviolet
light. | d. | EM
waves. | | | | |
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|
115.
|
When
pigments are mixed the result is called a. | color addition. | c. | color absorption. | b. | color
subtraction. | d. | color
scattering. | | | | |
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116.
|
An
electromagnetic wave is a wave that a. | can travel only through matter. | b. | can travel only through
empty space. | c. | consists of changing electric and magnetic
fields. | d. | is the same as sound waves and water waves. | | |
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117.
|
What
kind of waves are used in radar for detecting the speed of a car? a. | gamma
rays | c. | infrared
waves | b. | X rays | d. | microwaves | | | | |
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|
|
118.
|
What
kind of waves can be used to treat some cancerous tumors? a. | gamma
rays | c. | infrared
rays | b. | X
rays | d. | microwaves | | | | |
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|
119.
|
Earth
is 384,000 km from the moon. How long does it take light to travel this distance? Hint: The speed of
light is 300,000 km/s. a. | 1.28 min | c. | 0.128 s | b. | 12.80
s | d. | 1.28
s | | | | |
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|
120.
|
What
are electromagnetic waves? a. | sound waves | c. | changing gravitational fields | b. | electricity | d. | changing
electric and magnetic fields | | | | |
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|
121.
|
The
moon is 384,000 kilometers from Earth. How long does light take to travel that distance? Hint: The
speed of light is 300,000 km/s. a. | 1.28 seconds | c. | 0.78 seconds | b. | 12.8
seconds | d. | 7.8
seconds | | | | |
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|
122.
|
What
separates white light into different colors? a. | diffraction | c. | scattering | b. | refraction | d. | transmission | | | | |
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|
123.
|
What
causes us to see the color of an opaque object? a. | the colors of light that are
reflected | b. | the colors of light that diffracted | c. | the colors of
light that are transmitted | d. | the colors of light that are
refracted | | |
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124.
|
What
color of light do you see when looking through a colored transparent object? a. | the color that
was diffracted | c. | the color that
was scattered | b. | the color that was absorbed | d. | the color that was transmitted | | | | |
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|
125.
|
What
is mixing red, green, and blue light an example of? a. | color
matching | c. | color
subtraction | b. | color addition | d. | color deficiency | | | | |
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Other
|
|
|
Use the
figures below to answer the following questions.
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|
126.
|
Look
at the Figure C above. The block is moving. What force acts against the movement of the
block?
a. static friction | b. kinetic friction | c. a magnetic
force | d. gravitational force | |
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|
INTERPRETING GRAPHICS
Use the image
below to answer the following questions.
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|
127.
|
_____
The vibrating stirrup causes the oval window to vibrate.
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|
128.
|
_____
Movement of liquid inside cochlea causes hair cells to bend.
|
|
|
Use the image below to answer the following questions.
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|
|
129.
|
Look
at the diagram. What happens at point B?
a. deconstructive
interference | c. sonic boom is produced | b. shock wave is produced | d. supersonic
speeds | | |
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|
|
INTERPRETING GRAPHICS
Use the
figure below to answer the following question.
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|
|
130.
|
The
figure is an example of
a. color
matching. | c. color subtraction. | b. color addition. | d. color
deficiency. | | |
|
