WCAS Review : Energy Transfer and Conservation

What is energy?

• The ability to sleep

• The ability to do work

• The ability to eat

• The ability to read books

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Which of the following is an example of potential energy?

• A moving car

• A bouncing basketball

• A ball on a high shelf

• A running faucet

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When a ball falls off a shelf, what type of energy does it gain as it moves downward?

• Potential energy

• Kinetic energy

• Chemical energy

• Thermal energy

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What is the law of conservation of energy?

• Energy can be created and destroyed.

• Energy can only change from kinetic to potential.

• The total energy in a closed system remains constant.

• Energy can only change from potential to kinetic.

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Consider a roller coaster ride. What principle does it demonstrate in terms of energy conservation?

• Energy can be created and destroyed during the ride.

• Energy can only change from kinetic (motion) to potential (height) during the ride.

• The total energy (kinetic and potential) of the roller coaster in a closed system remains constant.

• Energy can only change from potential (height) to kinetic (motion) during the ride.

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Why is conserving energy important for the environment?

• It makes energy more expensive.

• It reduces pollution and helps combat climate change.

• It makes energy less available for future generations.

• It has no impact on the environment.

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What is one way to save energy at home?

• Leave lights on in empty rooms.

• Keep the thermostat at a constant high temperature.

• Unplug devices when they are not in use.

• Use incandescent bulbs instead of LED bulbs.

Which type of energy is associated with motion?

• Potential energy

• Thermal energy

• Kinetic energy

• Chemical energy

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Which of the following is NOT a benefit of conserving energy?

• Reducing pollution

• Saving money

• Increasing energy availability

• Combatting climate change

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What happens to the total energy in a closed system according to the law of conservation of energy?

• It decreases over time.

• It increases over time.

• It remains constant.

• It depends on the type of energy.

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