What Is Sound

What is sound?

• Energy caused by vibration you can hear.

• To move back and forth very quickly.

• How high or low a sound is.

• The ability to make something move or change.

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Sound is...

• a beautiful thing

• a wave or vibration

• a kind of music

• a musical instrument

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Sound is a result of vibrating ________.

• matter

• light

Sound is a form of _________.

• light

• energy

• matter

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A type of wave that vibrates and sends waves of energy through a medium to our ears.

• electromagnetic

• light

• sound

• ocean

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How do sound waves travel from one place to another?

• Through a vacuum only

• Through solid, liquid, and gas

• Through light

• Through electricity

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When an ambulance moves AWAY from you it sounds ________ pitched. 

• high

• low

• medium

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Why do sound waves need a medium to travel?

• They need to bounce off objects.

• They need a medium to carry the vibration.

• They cannot travel in a vacuum.

• Both B and C are correct.

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What type of waves are sound waves?

• Transverse waves

• Longitudinal waves

• Surface waves

• Electromagnetic waves

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A sound wave that bounces back toward its source and is heard again is called

• a compression

• a wavelength

• timbre

• an echo

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