Sound

Match it! Select the correct answer from the pull down...Good luck!

A back-and-forth movement of matter is its _____________.

A sound that bounces off a surface is called an ________________________.

Sounds above ____________________ dB can cause pain and can damage a person's ears.

Sound travels best through ____________________.

The number of vibrations per second is the _____________.

How high or low a sound is is the ____________.

Why can't sound be heard in space?

The longer the string, the _____________________ the sound.