Review #9 / Sound Waves

The changing pitch of police car's siren as it moves by you is an example of

• speed of sound

• doppler effect

• resonance

• intensity

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NGSS.HS-PS4-1

 Sound travels as a ____________ wave.

• transverse

• electromagnetic

• longitudinal

• gamma

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NGSS.MS-PS4-1

Which term refers to how high or low a sound seems to a person?

• intensity

• reflection

• volume

• pitch

Dolphins can hear sounds with frequencies as high as 200,000 Hz. These sound waves are too high for the human ear and are called 

• interference

• doppler waves

• resonance

• ultrasound waves

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NGSS.HS-PS4-1

A system of detecting objects under water using reflected sound waves is

• dissonance

• sonar

• acoustics

• infrasound

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NGSS.MS-PS4-2

The picture shows sound waves from a musical instrument. In which way is the sound wave in picture 1 different from the sound wave in picture 2?

• it has a lower pitch

• It has a lower volume

• It has a greater amplitude

• It has a higher frequency

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NGSS.MS-PS4-1

Why can't sound waves travel through a vacuum?

• There are no particles to travel through and vibrate.

• It is not dense enough.

• The frequency is too high.

• Sound waves can travel through a vacuum.

Tags

NGSS.MS-PS4-2

Choose the unit that is used to measure how loud or powerful a sound is.

• wavelength

• decibel

• longitudinal

• sonar

Which wave represents the sound with the lowest pitch?

• A

• B

• C

• D

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NGSS.MS-PS4-1

What happens when a wave reflects?

• It bends as it enters a new medium.

• It splits into smaller waves.

• It bounces off the surface of a barrier.

• It bends to move around a barrier.

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NGSS.MS-PS4-2