Across
1
Our home planet
3
Disturbance that transfers energy
4
Particle of light
5
Compound containing oxygen
9
Precious yellow metallic element
10
Push or pull on an object
Down
2
Nerve cell in the brain
3
Unit of power
4
Tectonic landmass section
6
Icy body with a tail near the sun
7
Group of similar cells
8
Unit of force