Across
1
Center of an atom or cell
2
Natural satellite of Earth
5
Gas form of a liquid
7
Compound containing oxygen
10
Solid with repeating atomic pattern
11
Group of similar cells
Down
2
Measure of matter in an object
3
Particle of light
4
Tissue that contracts for movement
6
Push or pull on an object
8
Unit of energy
9
Fourth state of matter