What must sound waves travel through to be heard?

• matter

• nothing

Sound waves look different based on the ______.

• pitch

• the sound

What happened to the sound wave as he lowered the pitch?

What is the wavelength of the wave?

• The length of the wave.

• The height of the wave.

• The speed of the wave.

The peak of the wave is the ______ of the wave.

• trough

• crest

• wavelength

• amplitude

The frequency is directly related to the _____ of the wave.

• amplitude

• height

• speed

Frequency is measured in _______.

• millimeters

• inches

• hertz

• hurts

The higher to frequency the ______ the wavelength.

• longer

• shorter

Amplitude is the same as the ______ of the wave.

• speed

• height

• length

The ________ the sound the _______ the amplitude.

• quieter, higher

• louder, lower

• louder, higher