sound waves

Sound waves help us:

• see

• hear

• smell

Sound waves are:

• visible

• invisible

What happens when we record our voice on the computer?

• We can SEE the sound wave our voice makes.

• We can HEAR our own voice when we hit "play".

PEOPLE make sound waves when they:

• sing

• whisper

• yell

• stand quietly

Animals make sound waves when they:

• stand still

• growl

• bark

• chirp

Machines create sound waves too.

• false

• true

You can FEEL loud sound when your hands touch a speaker.

• true

• false

A special kind of sound wave is an ECHO because:

• you can't hear it.

• the sound bounces off a hard surface and you can hear something more than once.

Sound waves CAN travel in outer space.

• false

• true

Sound needs AIR to travel.

• true

• false