Chapter 4 Review

A machine is a tool that simplifies tasks.

• True

• False

Is energy always associated with movement?

• Yes

• No

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Work is measured in Joules.

• True

• False

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Aria is observing a wind-up toy car. She notices that as the car moves, it eventually slows down and stops. Does the total energy in the car decrease as it changes forms?

• True

• False

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Aria is learning about energy efficiency in her science class. She wonders if machines can be 100% efficient.

• True

• False

Energy cannot be created or destroyed; it remains constant.

• True

• False

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The unit for energy is _____.

• Watt

• Newton

• Joule

• kilograms

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Energy stored in stretched rubber bands is ________.

• Chemical Potential Energy

• Gravitational Potential Energy

• Kinetic Energy

• Elastic Potential Energy

What is the term for the product of force and displacement in the direction of the force?

• Energy

• Momentum

• Work

• Power

What type of energy is associated with an object in motion?

• Sound Energy

• Electrical Energy

• Nuclear Energy

• Kinetic Energy

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