vibrations of energy are ______

rapid back and forth movements are ______

the distance between one crest or trough to the next are ______

bats, dolphins, and submarines use ______

The brain interprets lenses as sound.

Light waves are transverse waves.

We cannot hear ultrasound waves.

Frequency is velocity of metal.

Energy that moves is potential energy.

Longitudinal and transverse are the two main kinds of waves.

The bottom of the wave is its crest.

Wave frequencies are measured in hertz (Hz).

Protect your hearing by wearing ear plugs around loud noises.

Land animals usually have better hearing than underwater animals.