Across
1
Push or pull on an object
4
Tissue that contracts for movement
5
Amplified beam of light
8
Naturally occurring inorganic solid
9
Solid with repeating atomic pattern
11
Biological catalyst
Down
2
Disturbance that transfers energy
3
Glass that splits light into spectrum
4
The Red Planet
6
Group of similar cells
7
Mass per unit volume
10
Unit of heredity
12
Compound containing oxygen