Nature of Sound

Sound waves are made up of ...

• vibrating particles

• light photons

• magnetic variations

• infrared waves

• flowing electrons

Tags

NGSS.MS-PS4-1

Instruments give out sounds. What do all instruments have in common?

• They make vibrations when played

• They trap air so it’s still

• They attract vibrations

• They absorb all vibrations

• They are made of wood

Which direction do sound waves move?

• outwards in all directions

• inwards towards the source

• downwards towards gravity

• North or south to the poles

• in circular loops

Tags

NGSS.MS-PS4-1

Which best describes the motion of a sound wave?

• up and down

• forward and back

• circular spirals

Tags

NGSS.MS-PS4-1

A sound wave can NOT travel if there ....

• are no particles

• is no gravity

• is no oxygen

• is no light

Tags

NGSS.MS-PS4-2

True or false: Sound waves can travel in the vacuum of space

• true- they can

• false- they can't

Which diagram best represents the actual motion of a sound wave in air?

• A

• B

Tags

NGSS.MS-PS4-1

There are more air particles at A. What is area A called ?

• a rarefaction

• a compression

Talking creates ​ (a)   that travel from the source to someone's ear like a mexican wave

• vibrations
• air particles
• electromagnetic waves
• a vacuum

Tags

NGSS.MS-PS4-1

There are less air particles at B. What is area B called ?

• a rarefaction

• a compression