Across
1
Naturally occurring inorganic solid
4
Positive particle in nucleus
6
Amplified beam of light
10
Biological catalyst
11
Glass that splits light into spectrum
13
Unit of heredity
Down
1
Measure of matter in an object
2
Unit of force
3
Group of similar cells
5
Element found in all living things
7
Push or pull on an object
8
Gas form of a liquid
9
Tissue that contracts for movement
12
Compound containing oxygen