sound waves

Front

Sound waves help us: see, hear, smell

Back

hear

Front

Sound waves are:

Back

invisible

Front

Do machines create sound waves?

Back

true

Front

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

Back

true

Front

A special kind of sound wave is an ECHO because:

Back

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

Front

Can sound waves travel in outer space?

Back

false

Front

Sound needs AIR to travel.

Back

true