Across
1
Our home planet
3
Nerve cell in the brain
6
Naturally occurring inorganic solid
10
Unit of electric potential
11
Compound containing oxygen
Down
2
Solid with repeating atomic pattern
4
Ball of burning gas in space
5
Amplified beam of light
7
Particle of light
8
Infectious microscopic agent
9
Unit of force
12
Form of thermal energy