Across
1
Fourth state of matter
4
Compound containing oxygen
5
Absolute temperature scale unit
6
Unit of heredity
9
Smallest unit of an element
10
Hottest planet in solar system
Down
1
Particle of light
2
Preserved remains of ancient life
3
Tectonic landmass section
7
Measure of matter in an object
8
Group of similar cells
11
Unit of energy