Across
1
Form of thermal energy
3
Absolute temperature scale unit
4
Particle of light
5
Fourth state of matter
7
Reddish electrical conductor
11
Solid with repeating atomic pattern
Down
2
Compound containing oxygen
5
Positive particle in nucleus
6
Molten rock beneath Earth surface
8
Tissue that contracts for movement
9
Ball of burning gas in space
10
Basic unit of life