Across
1
Glass that splits light into spectrum
3
Unit of heredity
4
Unit of power
7
Infectious microscopic agent
8
Icy body with a tail near the sun
9
Unit of force
10
Element found in all living things
11
Our home planet
Down
1
Particle of light
2
Molten rock beneath Earth surface
5
Compound containing oxygen
6
Tissue that contracts for movement
12
Tectonic landmass section