WAVES

Sound waves must travel through ___________________.

• air

• a medium

• an outward area

• a short

Sound waves can NOT travel through

• Air

• Water

• Earth

• space

Changing the frequency of a sound wave affects the...

• Volume

• Amplitude

• Pitch

• Resonance

The higher the frequency, the ____________ the wavelength.

• longer

• shorter

• taller

• bolder

Why is sound able to travel faster through a solid than a gas?

• Gas molecules are packed tightly.
• Solid molecules move quickly.
• Solid molecules are packed tightly.
• Gas molecules move slowly.

A sound with a high pitch would have:

• a low frequency
• a high frequency
• a low amplitude
• a high amplitude

This is what you get when sound waves are reflected, or bounce back, off of a hard surface.

• Amplitude
• Pitch
• Volume
• Echo

Why is the school library covered with carpet?

• So everyone can make a lot of noise
• to help absorb sounds to keep it quiet
• because it looks good
• to help absorb sounds so it can stay noisy

An ambulance is driving towards you as you stand on the sidewalk. What happens to the pitch of the siren as it comes towards you?

• It increases

• It decreases