Across
1
Naturally occurring inorganic solid
5
Biological catalyst
7
Group of similar cells
8
Hottest planet in solar system
11
Unit of energy
Down
2
Infectious microscopic agent
3
Tissue that contracts for movement
4
Measure of matter in an object
6
Element found in all living things
9
Unit of force
10
Unit of heredity
12
Compound containing oxygen