You can measure wavelength by finding the distance between two crests.

The trough is the highest point waves.

The top of a wave is called a crest.

Any matter that vibrates can make sound.

Volume never depends on how far away a listener is from the sound.

A bird makes a lower sound than a lion.

Sound waves have different properties.

The sound waves lose energy as they travel away from the siren.

All matter is made up of small particles that have electric charges.

The types of energy are:

...how high or low a sound is

...how loud or soft a sound is

The energy of moving particles...

...the transfer of thermal energy

Energy can travel in the form of __________.

________________ is a kinetic and potential energy.

Sounds could be ________ and ___________.

Burning is a chemical change that can produce ___________ and ___________.

To take in light

To bounce light off an object

To bend light

To bend light

... a dark area formed when objects block light

... energy we can see