Sound energy

What is sound?

• A type of gas

• A form of energy

• A kind of liquid

• A type of light

Why does sound travel slower than light?

• Light is a wave

• Light is faster

• Sound is heavier

• Sound needs a medium

How does sound reach our ear?

• A wave of energy hits our ear

• Sound energy vibrates particles that bump into each other, passing the sound to our ear

• Atoms of sound move into our ear

• Light carries sound to our ear

In which medium does sound travel the fastest?

• Metal

• Water

• Air

• Vacuum

What happens to sound in a vacuum?

• It travels faster

• It becomes louder

• It cannot travel

• It changes color

Which of the following can sound NOT travel through?

• Solids

• Liquids

• Gasses

• Space

Why can't we hear a cell phone ring in a vacuum?

• The phone is too quiet

• The vacuum is too loud

• Sound needs air to travel

• The phone is broken