A measure of how many wavelengths pass a point each second

Half the distance between a crest and a trough. (#1 in the picture)

The complete range/all of electromagnetic wave frequencies and wavelengths

The highest point of a TRANSVERSE wave

The lowest point of a TRANSVERSE wave

Waves that make matter in the medium (solid, liquid or gas) move back and forth at right angles to the direction the wave travels.

Think of making waves with a jump rope.

The distance between one point in a wave and the closest point just like it.

A disturbance that moves through matter and space and carries energy

a type of wave where matter in the medium moves back and forth in the same direction the wave travels.

Think of a slinky being compressed and released.

When a wave changes direction due to a change in its speed when it moves from one medium to another.

For example, light waves changing direction going from the air into a pool of water.

When a wave strikes an object and bounces off

For example, when light hits a shiny surface such as a mirror.

Waves that can travel through matter and empty space.

Think of what kind of waves reach Earth by traveling through space, and what kinds of waves will not travel in space.

Any substance through which a wave is transmitted

in other words,

any material that a wave can move through.