Across
1
Push or pull on an object
4
Our home planet
5
Naturally occurring inorganic solid
7
Preserved remains of ancient life
8
Form of thermal energy
12
Second lightest element
Down
2
Icy body with a tail near the sun
3
Unit of force
6
Unit of energy
9
Ball of burning gas in space
10
Amplified beam of light
11
Hottest planet in solar system