Across
1
Compound containing oxygen
5
Fourth state of matter
6
The Red Planet
9
Unit of heredity
10
Substance with pH below 7
11
Unit of energy
Down
2
Infectious microscopic agent
3
Smallest unit of an element
4
Form of thermal energy
6
Tissue that contracts for movement
7
Reddish electrical conductor
8
Disturbance that transfers energy