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- 1. Multiple Choice
When you put on the brakes of a bicycle, friction causes some of the mechanical energy to transfer to thermal energy.
True
False
- 2. Multiple Choice
According to the law of conservation of energy, energy can be created or destroyed.
True
False
- 3. Multiple Choice
In every energy transformation, some energy is always “lost” as ____ energy.
Chemical
Radiant
Electrical
Thermal
- 4. Multiple Choice
According to the law of conservation of energy, the total amount of energy in the universe ____.
remains constant
changes constantly
increases
decreases
- 5. Multiple Choice
Work _____ energy.
reduces
reflects
transfers
stops
- 6. Multiple Choice
Which equation is correct?
mechanical energy = kinetic energy – potential energy
mechanical energy = potential energy – kinetic energy
mechanical energy = kinetic energy + potential energy
mechanical energy = kinetic energy × potential energy
- 7. Multiple Choice
When two surfaces interact, some mechanical energy leaves the system as thermal energy due to ________.
surrounding heat
water
friction
fusion
- 8. Multiple Choice
Which of the following does NOT reduce friction?
grease
cotton
oil
graphite
- 9. Multiple Choice
A fire warms you by transferring _____ energy.
potential
thermal
chemical
nuclear
- 10. Multiple Choice
A couple of friends decide they want to play Fortnite together on their Playstation 4. When they turn the game on the TV, what kind of energy transfer is taking place?
Heat to electric
Electric to light
Chemical to electric
Electric to Light
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