Energy & Energy Transformations Unit Review
Authored by Erica Marshall
Science
7th Grade
NGSS covered
Used 12+ times
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32 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the law of conservation of energy?
Energy can be created from nothing and destroyed at any time
Energy changes form but the total amount remains constant in a closed system
Energy only exists as motion and cannot be stored
Energy is used up completely when work is done
Tags
NGSS.MS-PS3-4
NGSS.MS-PS3-5
NGSS.MS-PS3-2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does it mean for energy to be transferred? Choose the best everyday-life example.
Energy moves from one object or system to another, such as a moving bat giving motion to a ball
Energy disappears when it turns into heat, such as a phone warming up
Energy can only transfer if both objects are the same temperature
Energy transfer happens only in living things
Tags
NGSS.MS-PS3-5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Describe the difference between kinetic energy and potential energy. Select the statement that best shows both and includes one example of each.
Kinetic is energy waiting to move; potential is energy of motion. Example: kinetic—book on a shelf; potential—rolling ball
Kinetic is energy of motion; potential is energy due to position or condition. Example: kinetic—moving bicycle; potential—stretched rubber band
Kinetic and potential are the same; both depend only on temperature. Example: kinetic—hot soup; potential—cold ice
Kinetic is energy of motion; potential is energy waiting to move, but neither can change forms. Example: kinetic—parked car; potential—flying bird
Tags
NGSS.MS-PS3-4
NGSS.MS-PS3-5
NGSS.MS-PS3-2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student pushes a heavy box across the floor. Where does the energy come from and where does it go?
It comes from the student's chemical energy in muscles and becomes kinetic energy of the box with some thermal energy due to friction
It comes from the floor and becomes gravitational energy of the box
It appears from nowhere and disappears when the box stops
It comes only from heat in the air and becomes sound energy only
Tags
NGSS.MS-PS3-5
NGSS.MS-PS3-1
NGSS.MS-PS2-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a wave?
A traveling disturbance that transfers energy from place to place without permanently moving matter
A permanent movement of matter from one location to another
A stationary object that stores energy
A form of electricity that cannot travel through air
Tags
NGSS.MS-PS4-1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a wave, what wavelength tell us?
Amplitude indicates the energy or height of the wave from the rest position
Wavelength is the distance between two consecutive crests or compressions
Amplitude measures how fast the wave travels
Wavelength is the time it takes for one wave to pass a point
Tags
NGSS.MS-PS4-1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a wave, what does amplitude tell us?
Amplitude indicates the energy or height of the wave from the rest position
Wavelength is the distance between two consecutive crests or compressions
Amplitude measures how fast the wave travels
Wavelength is the time it takes for one wave to pass a point
Tags
NGSS.MS-PS4-1
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