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Worksheets7th Grade Energy Review & Test
Total questions: 46
Worksheet time: 24mins
Potential energy is best described as:
Energy of motion
Stored energy based on position
Energy lost to sound
Energy created from nothing
At the top of the first hill of your marble roller coaster, the marble has:
Mostly kinetic energy
Mostly potential energy
No energy at all
100% thermal energy
As the marble rolls down the first hill, its potential energy:
Increases
Decreases
Stays the same
Turns into matter
As the marble speeds up, its kinetic energy:
Increases
Decreases
Turns into gravity
Stays at zero
When the marble goes through the loop, it must have enough:
Kinetic energy
Electrical energy
Solar energy
Chemical energy
If the marble slows down from friction, some of its energy is converted into:
Sound and thermal energy
Potential energy only
Electrical energy
Solar energy
Thermal energy is caused by:
Vibrating particles
Gravity pushing down
Sound waves traveling
The marble screaming
Which of the following increases kinetic energy the MOST?
Mass
Sleeping
Height
Light
When the marble reaches the final small hill, it needs enough:
Thermal energy to melt the hill
Potential energy from friction
Kinetic energy to climb the hill
Electrical energy to charge the track
A moving object always has:
Kinetic energy
No energy
Stored energy only
The same energy forever
A hotter object has ______ thermal energy than a cooler object.
Less
More
The same
Zero
When you rub your hands together, the thermal energy increases because of:
Gravity
Friction
Light
Stored energy
At the very bottom of a hill, a marble will have:
Maximum potential energy
Maximum kinetic energy
Equal potential and kinetic
No energy
Mr. Osborn drops a ball. As it falls, potential energy goes:
Down, while kinetic goes up
Up, while kinetic goes down
Nowhere
Into chemical energy
On the roller coaster, which point would have the most potential energy?
Bottom of a hill
Middle of a loop
Highest hill
Inside a turn
A bigger mass at the same speed has:
More kinetic energy
Less kinetic energy
No kinetic energy
Unlimited energy
Which situation shows energy transferring into thermal energy?
Ice melting in your hand
A ball pausing at the top of a hill
A marble floating in midair
A book on a shelf
A roller coaster designer wants more speed. They should:
Make the first hill higher
Add more friction
Drop the marble into glue
Make the track rougher
Energy cannot be created or destroyed is known as:
Energy Law
Newton’s 2th Law
Conservation of Energy
The Loop-de-Loop Rule
When the marble stops at the end of the track, where did most of its energy go?
It disappeared
Into sound, heat, and friction
Into gravity
Into potential energy only
Fill in the blank: ________ energy is the energy of motion.
Kinetic
Potential
Thermal
Chemical
Fill in the blank: ________ energy is stored energy based on height or position.
Potential
Kinetic
Thermal
Chemical
23. What causes thermal energy?
Movement of particles
Presence of light
Chemical reactions only
Electric current
24. Describe one example from our roller coaster project where kinetic energy increased.
When the roller coaster sped up going down a hill.
When the roller coaster stopped at the station.
When the roller coaster was at the top of the hill and not moving.
When the roller coaster slowed down going up a hill.
Describe one example from our roller coaster project where potential energy decreased.
When the roller coaster descended from the top of a hill.
When the roller coaster was being pulled up the first hill.
When the roller coaster was stopped at the station.
When the roller coaster was at the highest point of the track.
When friction happens, some energy always turns into ___________.
thermal energy
electrical energy
sound energy
light energy
The first hill of a roller coaster must be the tallest because:
it provides the most potential energy for the ride.
it is the safest part of the ride.
it is the most exciting part for riders.
it allows the coaster to go slower.
When the marble enters the loop, it does not fall out at the top because:
the centripetal force keeps it pressed against the track
gravity is stronger than the marble's speed
the marble is glued to the track
air resistance pushes the marble down
Fill in the blank: Thermal energy increases as particles begin to ___________.
move
shrink
stop
disappear
The coaster design controlled or used friction by:
using materials that increase friction to slow down the coaster at certain points
removing all friction to make the coaster go faster
ignoring friction in the design process
using only smooth surfaces to eliminate friction
An everyday example of potential energy turning into kinetic energy is:
A ball held at a height and then dropped
A car parked on a flat road
A book lying on a table
A person sitting still
Fill in the blank: The Law of Conservation of Energy states energy cannot be created or ___________.
destroyed
used
measured
increased
If your coaster had too much friction, what would happen?
It would slow down or stop before completing the track.
It would go faster than expected.
It would fly off the track.
It would have no effect on the ride.
What would happen if the coaster’s first hill was too low?
The coaster may not have enough speed to complete the ride.
The coaster would go faster than usual.
The coaster would be safer for riders.
The coaster would reach a higher point later in the ride.
One improvement to a roller coaster to better conserve energy is:
Using more efficient wheels and bearings
Adding more loops to the track
Increasing the height of the first drop
Reducing the number of support beams
Which of the following best describes how a marble's energy changes as it rides through a roller coaster, including the effects of potential energy at the top of the first hill, kinetic energy as it speeds down, energy changes in the loop, friction, and the final hill?
The marble starts with high potential energy at the top, gains kinetic energy as it speeds down, loses some energy to friction, needs enough energy to get over the final hill, and ends with little energy at the finish.
The marble has constant energy throughout the ride, unaffected by hills, loops, or friction.
The marble only gains energy as it moves, with no loss due to friction or hills.
The marble loses all its energy at the top of the first hill and cannot complete the ride.
What type of energy does a marble have while it is moving along a flat section of a roller coaster track?
Kinetic energy
Potential energy
Thermal energy
Chemical energy
Which factor would most likely increase the amount of friction on a roller coaster track?
Adding more loops
Decreasing the mass of the marble
Making the track steeper
Using rougher materials for the track
When a marble stops at the end of a roller coaster, most of its energy has been converted into:
Thermal and sound energy
Light energy
Potential energy
Chemical energy
What is the Total Energy of the system?
14 J
12 J
6 J
8 J
What is the kinetic energy at W, where the car is stopped?
0J
10,000J
20,000J
can not be determined
In what situation can energy be created or destroyed?
In a nuclear reaction
During photosynthesis
When work is done
Never
A roller coaster car moves on a roller coaster track through positions w, x, y, and z. At what position will the roller coaster car most likely have the greatest kinetic energy?
W
X
Y
Z
