Waves Sound

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

• speed of sound

• doppler effect

• resonance

• intensity

Sound travels as a ____________ wave.

• transverse

• electromagnetic

• longitudinal

• gamma

Tags

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

Tags

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.

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.

What type of waves are sound waves?

• Transverse waves

• Longitudinal waves

• Surface waves

• Electromagnetic waves

Tags

NGSS.MS-PS4-2

How does the medium affect the speed of sound?

• Sound travels faster in solids than in gases

• Sound travels faster in gases than in solids

• The medium does not affect the speed of sound

• Sound cannot travel through solids

In which medium would sound travel the fastest?

• Air

• Water

• Steel

• Vacuum

Which wave represents the sound with the lowest pitch?

• A

• B

• C

• D

Tags

NGSS.MS-PS4-1

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

• intensity

• reflection

• volume

• pitch