Across
1
Naturally occurring inorganic solid
3
Positive particle in nucleus
4
Hottest planet in solar system
5
Compound containing oxygen
8
Tectonic landmass section
9
Amplified beam of light
Down
2
Magnetic metallic element
3
Particle of light
6
Absolute temperature scale unit
7
Molten rock beneath Earth surface
10
Smallest unit of an element
11
Biological catalyst
12
Element found in all living things