Across
1
Tectonic landmass section
5
Molten rock beneath Earth surface
6
Natural satellite of Earth
7
Unit of energy
10
Biological catalyst
12
Form of thermal energy
13
Ball of burning gas in space
Down
2
Reddish electrical conductor
3
Smallest unit of an element
4
Icy body with a tail near the sun
8
Amplified beam of light
9
Gas form of a liquid
11
Particle of light