Across
1
Naturally occurring inorganic solid
6
Unit of force
7
The Red Planet
8
Second lightest element
10
Element found in all living things
11
Particle of light
12
Unit of power
Down
2
Magnetic metallic element
3
Our home planet
4
Form of thermal energy
5
Positive particle in nucleus
9
Unit of energy
13
Hottest planet in solar system