Across
1
Positive particle in nucleus
3
Our home planet
5
Preserved remains of ancient life
7
Naturally occurring inorganic solid
10
Element found in all living things
11
Unit of force
12
Ball of burning gas in space
Down
2
Compound containing oxygen
4
Path of a planet around the sun
6
Solid with repeating atomic pattern
8
Precious yellow metallic element
9
Natural satellite of Earth
13
Basic unit of life