Energy 17

Multiple Choice

How is the electric energy transferred to sound energy?

• The coil creates electricity.

• The hum of electricity creates music.

• The electricity causes a coil to vibrate, which creates sounds.

• The electricity heats the coil, which creates sounds.

Multiple Choice

What creates sound waves?

• heat

• vibrations

• electricity

• power cords

Multiple Choice

How does a speaker help us hear sound waves?

• It amplifies them.

• It makes them quiet.

• It cancels them out.

• It uses heat to create them.

Dropdown

When ​

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enters a speaker, it ​

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a coil.