Across
1
Absolute temperature scale unit
5
Unit of force
6
Element found in all living things
8
Our home planet
11
Precious yellow metallic element
12
Biological catalyst
13
Compound containing oxygen
Down
2
Positive particle in nucleus
3
Gas form of a liquid
4
Push or pull on an object
7
Disturbance that transfers energy
9
Preserved remains of ancient life
10
Naturally occurring inorganic solid