Across
1
Preserved remains of ancient life
2
Fourth state of matter
3
Nerve cell in the brain
5
Solid with repeating atomic pattern
9
Gas form of a liquid
10
Push or pull on an object
Down
2
Particle of light
4
Amplified beam of light
5
Reddish electrical conductor
6
Unit of energy
7
Absolute temperature scale unit
8
Mass per unit volume
11
Force that attracts objects together