SURVIVOR What will happen to sound waves traveling through the air when they reach water? A. they...
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SURVIVOR
SURVIVOR What will happen to sound waves traveling through the air when they reach water? A. they will speed up B. they will slow down C. they will not
What will happen to sound waves traveling through the air when
they reach water? A. they will speed up B. they will slow down C.
they will not change D. they will stop
Slide 4
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.
Slide 5
Where along the roller coaster track does the rider have the
greatest amount of kinetic energy? A.position 1 B.position 2 C.
position 3 D.position 4 1 2 3 4
Slide 6
Which planet has the strongest gravitational force according to
the data given? A. Earth B. Mars C. Jupiter D. Pluto PlanetMass of
a golf ball on that planet Weight of a golf ball on that planet
Earth0.045 kg.441 N Mars0.045 kg.169 N Jupiter0.045 kg1.12 N
Pluto0.045 kg.026 N
Slide 7
When does the mass of an object change? A. When matter is taken
away or added B. When gravity on the object changes C. When it
undergoes a physical change D. When friction acts on the
object.
Slide 8
Which measurement do scientists use to most accurately describe
the amount of matter in an object? A. Density B. Weight C. Mass D.
Volume
Slide 9
If the box has a mass of 20 N, how much force will be required
to lift it with this lever? A. 5 B. 10 C. 20 D. 50
Slide 10
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..
Slide 11
Why does the spoon in the glass of water look like it is bent?
A. light creates shadows that confuse the eye B. light travels at
different speeds through water and air C. water is reflecting the
image of the spoon in air D. water cannot carry light waves, only
reflect it.
Slide 12
Which of the following objects has the greatest amount of
gravitational force acting on Earth? A. A kick ball B. A bowling
ball C. An 8 th grade student D.A car
Slide 13
Which planet has the least mass according to the data given? A.
Earth B. Mars C. Jupiter D. Pluto PlanetMass of a golf ball on that
planet Weight of a golf ball on that planet Earth0.045 kg.441 N
Mars0.045 kg.169 N Jupiter0.045 kg1.12 N Pluto0.045 kg.026 N
Slide 14
As a basketball bounces, the height of each bounce is lower
than the previous bounce. How can this be explained? A. by the
amount of air pressure in the basketball B. by the type of material
the ball is made from C. by friction acting on the ball D. by the
hardness of the flooring material
Slide 15
As the distance from an object increases, the amount of
gravitational force felt by the object A. increases B. decreases C.
stays the same D. disappears
Slide 16
What is the mechanical advantage of this lever? A..5 B. 1 C. 2
D. 50
Slide 17
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 peoples 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.
Slide 18
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.
Slide 19
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.
Slide 20
Which of the following is an example of friction being reduced?
A. brakes on a car slowing it down B. rubbing your hands together
rapidly C. tires of a car screeching on pavement D. adding oil to a
moving machine part
Slide 21
Which is an example of a device that uses levers to create a
mechanical advantage? A. electricity passing through a wire. B. a
car moving on wheels C. a bottle holding water D. a screwdriver
opening a can of paint.
Slide 22
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.
Slide 23
How are sound and light waves different? A. Sound has
wavelengths, light does not B. Sound can be measured, light cannot
C. Light travels through space, sound cannot D. Light travels more
slowly than sound
Slide 24
An experiment in the 1700s 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 Earths 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
Earths rotation is calculated.
Slide 25
How is the mechanical advantage of a lever determined? A. by
subtracting the effort arm length from the resistance arm B. by
adding the effort arm and the resistance arm length C. by
multiplying the effort arm times the resistance arm D. by dividing
the length of the effort arm by the resistance arm
Slide 26
Which of the following is a way science has affected the
ability of people to sense sound? A. made telescopes possible B.
designed glasses C. invented magnetic image sensing D. developed
hearing aids
Slide 27
Which of the following characteristics of a spaceship would
change if it traveled to the moon? A. Density B. Weight C. Mass D.
Volume
Slide 28
How do plants respond to light? A. they do not respond to light
B. their roots move the plant away from the light C. their leaves
grow toward a light source D. they store kinetic energy from the
light.
Slide 29
Which is a way people try to increase the friction on a car? A.
add motor oil B. add gasoline C. buy new tires D.clean the
windows
Slide 30
What produces motion for in an object? A. balanced forces B.
unbalanced forces C. moving forces D. frictional forces
Slide 31
At which point along the ride would there be the most potential
energy? A.position 1 B.position 2 C. position 3 D.position 4 1 2 3
4
Slide 32
Which of the following best summarizes the relationships
between energy, forces and motion? A. energy creates a force that
may cause motion B. energy creates a force that always causes
motion C. forces create energy which may cause motion D. forces
create energy which always causes motion.
Slide 33
What type of energy is stored in a stretched elastic cord?
A.nuclear B.potential C. kinetic D.chemical
Slide 34
What is another example of the process at A? A. hot air rising
to take a balloon into the sky B. burning yourself on a hot stove
burner. C. sitting out in the sun and getting a sunburn D. using
electricity to turn a computer on
Slide 35
What do scientists call the "energy of motion? A.motorized
energy B.potential energy C. chemical energy D.kinetic energy
Slide 36
Which of the following is an example of light energy being
changed to chemical energy? A. a solar panel that charges a battery
B. a flashlight with rechargeable batteries C. a switch that flips
up to turn on a light D. food that is eaten to provide mechanical
energy
Slide 37
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
Slide 38
What is the relationship between the speed of sound and the
density of the substance it travels through? A. Sound travels the
fastest in gas mediums B. The less dense the medium, the faster it
travels C. The density of the medium does not affect the speed of
sound D. The more dense the medium, the faster it travels
Slide 39
Which of the following uses gravity to do work? A. water behind
a dam turns an electrical turbine. B. fossil fuels are burned to
make electricity. C. people eat food and it allows them to do work.
D. lightning strikes a tree and it catches fire.
Slide 40
A snake comes out of its hole in the morning and warms itself
on a rock. What has the snake responded to? A. the smells and
sounds of morning B. the spinning of Earth on its axis C. moisture
in the soil D. heat and light from the sun