Across
1
Glass that splits light into spectrum
4
Fourth state of matter
5
Unit of force
8
Amplified beam of light
10
Unit of electric potential
12
Substance with pH below 7
13
Biological catalyst
Down
2
Solid with repeating atomic pattern
3
Natural satellite of Earth
6
Force that attracts objects together
7
Center of an atom or cell
9
Icy body with a tail near the sun
11
Absolute temperature scale unit