How You Hear Sound

What is frequency?

• the number of vibrations per second

• how high or low a sound is

• the loudness or softness of a sound

• the back and forth movement of matter

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NGSS.MS-PS4-1

Measure of how high or low a sound is

• amplitude

• compression

• speed of sound

• pitch

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NGSS.MS-PS4-1

An object that does not vibrate cannot produce

• sound

• light

• heat

• electricity

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NGSS.MS-PS4-2

What happens when we hear an echo?

• We know there is danger

• there must be someone yelling back to us

• Sound is reflected off a surface and repeated back

• sounds waves are traveling really fast

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NGSS.MS-PS4-2

_________ is a form of energy that we can hear and travels through the air.

• sound

• volume

• energy

• wave

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

___________ is made when something vibrates

• light

• sound

• drum

• pounding

Sound is...

• a beautiful thing

• a wave or vibration

• a kind of music

• a musical instrument

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

Why do we hear a sound?

• because of the vibrations that travel into our ears through waves

• because we love music

• because we pay attention

• because we can play the guitar

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

When an object vibrates, it produces:

• Colours.

• Nothing.

• Sound waves.

Tags

NGSS.MS-PS4-1

What part of the ear is responsible for converting sound waves into electrical signals?

• Cochlea

• Eardrum

• Auditory Canal

• Pinna