What will happen to sound waves traveling through the
air when they reach water?
A.
B.
C.
D.
they will speed up
they will slow down
they will not change
they will stop
How do humans sense energy differently than wild
animals like a wolf or deer?
A. some human senses are more highly developed, some
are less.
B. humans sense the environment the same way that
wild animals do.
C. wolves and deer have different senses than humans
do.
D. humans are the only creatures that can sense the
environment.
Where along the roller coaster track does the rider
have the greatest amount of kinetic energy?
1
4
2
3
A. position 1
B. position 2
C. position 3
D. position 4
Which planet has the strongest gravitational force
according to the data given?
A.
B.
C.
D.
Earth
Mars
Jupiter
Pluto
Planet
Mass of a golf ball
on that planet
Weight of a golf ball
on that planet
Earth
0.045 kg
.441 N
Mars
0.045 kg
.169 N
Jupiter
0.045 kg
1.12 N
Pluto
0.045 kg
.026 N
When does the mass of an object change?
A.
B.
C.
D.
When matter is taken away or added
When gravity on the object changes
When it undergoes a physical change
When friction acts on the object.
Which measurement do scientists use to most
accurately describe the amount of matter in an object?
A.
B.
C.
D.
Density
Weight
Mass
Volume
If the box has a mass of 20 N, how much force will be
required to lift it with this lever?
A.
B.
C.
D.
5
10
20
50
After conducting several experiments, Isaac Newton
concluded that light is a combination of different
wavelengths. Which evidence supports his conclusion?
A. light is white.
B. light is found all over the universe.
C. light separates into colors in a prism.
D. light can travel very rapidly through space..
Why does the spoon in the glass of water look like it is
bent?
A.
B.
C.
D.
light creates shadows that confuse the eye
light travels at different speeds through water and air
water is reflecting the image of the spoon in air
water cannot carry light waves, only reflect it.
Which of the following objects has the greatest amount
of gravitational force acting on Earth?
A.
B.
C.
D.
A kick ball
A bowling ball
An 8th grade student
A car
Which planet has the least mass according to the data
given?
A.
B.
C.
D.
Earth
Mars
Jupiter
Pluto
Planet
Mass of a golf ball
on that planet
Weight of a golf ball
on that planet
Earth
0.045 kg
.441 N
Mars
0.045 kg
.169 N
Jupiter
0.045 kg
1.12 N
Pluto
0.045 kg
.026 N
As a basketball bounces, the height of each bounce is
lower than the previous bounce. How can this be
explained?
A.
B.
C.
D.
by the amount of air pressure in the basketball
by the type of material the ball is made from
by friction acting on the ball
by the hardness of the flooring material
As the distance from an object increases, the amount of
gravitational force felt by the object
A.
B.
C.
D.
increases
decreases
stays the same
disappears
What is the mechanical advantage of this lever?
A.
B.
C.
D.
.5
1
2
50
How does understanding gravity help a chair designer?
A. the chair must be attractive enough for people to want to buy
it.
B. the chair must be strong enough to hold people’s weight.
C. the chair must be made out of materials that are easy to find.
D. the chair must be the same shape as other types of chairs.
How does a lever allow a weight to be lifted that is too
heavy to be lifted without a lever?
A. It contains energy to do the lifting and reduce the distance
traveled.
B. It reduces the weight of the object making it easier to lift.
C. It reduces the force needed but increases the distance it is
applied.
D. It reduces the mass of the object and decreases the distance.
Which of the following describes the mathematical
relationship between the length of the arms on a lever?
A. the longer the effort arm, the less the force needed to lift a
mass
B. the longer the effort arm, the greater the force needed to lift
a mass
C. the longer the resistance arm, the less the force needed to lift
a mass
D. the shorter the resistance arm, the greater the force needed
to lift a mass.
Which of the following is an example of friction being
reduced?
A.
B.
C.
D.
brakes on a car slowing it down
rubbing your hands together rapidly
tires of a car screeching on pavement
adding oil to a moving machine part
Which is an example of a device that uses levers to
create a mechanical advantage?
A.
B.
C.
D.
electricity passing through a wire.
a car moving on wheels
a bottle holding water
a screwdriver opening a can of paint.
You can estimate how far away a lightning bolt strikes
by counting the seconds between seeing the lightning
and hearing the thunder. Why does this work?
A. sound waves travel more slowly through air than light waves.
B. sound waves travel slowly through the ear canal before they can
be heard.
C. sound waves cannot travel through empty space, they need a
medium.
D. sound waves spread out from a source in circles and light does
not.
How are sound and light waves different?
A.
B.
C.
D.
Sound has wavelengths, light does not
Sound can be measured, light cannot
Light travels through space, sound cannot
Light travels more slowly than sound
An experiment in the 1700’s tried to measure the speed
of light with a clock by timing how long it took light to
travel from one lighthouse to another. The experiment
failed. The speed of light was eventually measured
when astronomers measured the time it took light to
travel from a planet to Earth. How did technology limit
the first experiment?
A. light cannot be measured as it travels through Earth’s
atmosphere.
B. light travels too fast for a clock to measure in short distances.
C. a clock will slow down when traveling at the speed of light.
D. a clock cannot be used unless Earth’s rotation is calculated.
How is the mechanical advantage of a lever determined?
A.
B.
C.
D.
by subtracting the effort arm length from the resistance arm
by adding the effort arm and the resistance arm length
by multiplying the effort arm times the resistance arm
by dividing the length of the effort arm by the resistance arm
Which of the following is a way science has affected
the ability of people to sense sound?
A.
B.
C.
D.
made telescopes possible
designed glasses
invented magnetic image sensing
developed hearing aids
Which of the following characteristics of a spaceship
would change if it traveled to the moon?
A.
B.
C.
D.
Density
Weight
Mass
Volume
How do plants respond to light?
A.
B.
C.
D.
they do not respond to light
their roots move the plant away from the light
their leaves grow toward a light source
they store kinetic energy from the light.
Which is a way people try to increase the friction on a
car?
A.
B.
C.
D.
add motor oil
add gasoline
buy new tires
clean the windows
What produces motion for in an object?
A.
B.
C.
D.
balanced forces
unbalanced forces
moving forces
frictional forces
At which point along the ride would there be the most
potential energy?
1
4
2
3
A. position 1
B. position 2
C. position 3
D. position 4
Which of the following best summarizes the
relationships between energy, forces and motion?
A.
B.
C.
D.
energy creates a force that may cause motion
energy creates a force that always causes motion
forces create energy which may cause motion
forces create energy which always causes motion.
What type of energy is stored in a stretched elastic
cord?
A. nuclear
B. potential
C. kinetic
D. chemical
What is another example of the process at “A”?
A.
B.
C.
D.
hot air rising to take a balloon into the sky
burning yourself on a hot stove burner.
sitting out in the sun and getting a sunburn
using electricity to turn a computer on
What do scientists call the "energy of motion?”
A. motorized energy
B. potential energy
C. chemical energy
D. kinetic energy
Which of the following is an example of light energy
being changed to chemical energy?
A.
B.
C.
D.
a solar panel that charges a battery
a flashlight with rechargeable batteries
a switch that flips up to turn on a light
food that is eaten to provide mechanical energy
What type of energy conversion is taking place inside a
flashlight when it is on?
A. mechanical energy to light energy
B. chemical energy to light energy
C. chemical energy to mechanical energy
D. electromagnetic energy to chemical energy
What is the relationship between the speed of sound
and the density of the substance it travels through?
A.
B.
C.
D.
Sound travels the fastest in gas mediums
The less dense the medium, the faster it travels
The density of the medium does not affect the speed of sound
The more dense the medium, the faster it travels
Which of the following uses gravity to do work?
A.
B.
C.
D.
water behind a dam turns an electrical turbine.
fossil fuels are burned to make electricity.
people eat food and it allows them to do work.
lightning strikes a tree and it catches fire.
A snake comes out of its hole in the morning and warms
itself on a rock. What has the snake responded to?
A.
B.
C.
D.
the smells and sounds of morning
the spinning of Earth on its axis
moisture in the soil
heat and light from the sun
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