Across
1
Ball of burning gas in space
2
Unit of force
4
Compound containing oxygen
9
Measure of matter in an object
10
Our home planet
Down
2
Nerve cell in the brain
3
Particle of light
5
Unit of energy
6
Tectonic landmass section
7
Infectious microscopic agent
8
Basic unit of life
9
Naturally occurring inorganic solid