Across
1
Nerve cell in the brain
4
Ball of burning gas in space
6
Molten rock beneath Earth surface
8
Gas essential for breathing
11
Natural satellite of Earth
12
Precious yellow metallic element
13
Tectonic landmass section
Down
1
Unit of force
2
Unit of energy
3
Amplified beam of light
5
Fourth state of matter
7
Compound containing oxygen
9
Chemical element in table salt
10
Solid with repeating atomic pattern