Across
1
Fourth state of matter
3
Unit of force
6
Compound containing oxygen
8
Tissue that contracts for movement
9
Unit of heredity
10
Ball of burning gas in space
14
The Red Planet
Down
2
Element found in all living things
4
Solid with repeating atomic pattern
5
Disturbance that transfers energy
7
Nerve cell in the brain
11
Gas essential for breathing
12
Group of similar cells
13
Unit of power