Sound is a form of -

• pitches

• waves

• voices

• energy

Sound moves in waves.

• false

• true

The greater the frequency of a sound wave, the -

• lower the pitch

• higher the pitch

• softer the sound

• louder the sound

As the amplitude of the sound wave increases, we would hear an increase in _____________.

• volume

• pitch

• frequency

• vibrations

All sound is produced by __________.

• vibrations
• wavelength
• timbre
• amplitude

Sound cannot travel through a __________.

• amplitude
• vacuum
• timbre
• vibration

Why does sound travel better through a solid?

• the particles are more dense

• the particles are less dense

Sounds travels slowest through...

• space
• solids/metals
• gas
• liquids

Why can't we hear sound in space?

• can't take our helmet off to hear
• Space has no mass / no gas/ solids/ liquids
• because it's dark
• Don't know, I've never been to space

What is the speed of sound?

• 340 m/s

• 700 mph

• 340 mph

• 3000000000 m/s