3.
to bounce off without absorbing
5.
a pattern that describes how energy is carried from one place to another
6.
a type of wave that carries energy from one place to another, even through empty space
7.
to form a mental picture of something that cannot be seen
8.
the maximum height of a wave
10.
a pattern that describes how energy is carried from one place to another
11.
how often or fast something happens
12.
source: an object that emits light
13.
anything that has mass and takes up space
14.
the number of peaks of a wave that pass in a second
15.
the distance from one peak of a wave to the next
