A vibration is the ________ movement of an object.

As sound travels through a material, what do the molecules in the material do?

The molecules ________ into each other, passing the pattern on to other molecules.

Sound is used by many organisms to ________.

Our vocal cords ________ when we talk and sing.

Sound can travel through which of the following?

Sound cannot travel through a ________.

Without vibrating particles, sound cannot exist.

What is an echo?

Sound can be ______ or ______ through a second material.

What is the speed of sound in air at 0 degrees Celsius?

What is the speed of sound in ocean water?

Areas where particles are very close together is called:

The number of compressions that pass by each point each second is a wave's ________.

Frequency is a measure of how often particles are ________.

The greater the frequency, the ________ the pitch of the sound.

The sound waves of louder sounds have more ________ when they reach your ear due to closeness or the sound vibrating more.

When the _______ gets to your ear, your eardrum will vibrate more than with a soft sound.

For a sound to be heard, energy must first cause an object to _______.

Vibrating objects transmit energy as _______.

The energy is transmitted through the air as _______.

When the energy reaches your ear, the eardrum _______ the energy and begins to _______.

Vibrations are interpreted as _______ in your brain.