Across
1
Biological catalyst
4
Positive particle in nucleus
5
Substance with pH below 7
6
Infectious microscopic agent
7
Tissue that contracts for movement
8
Naturally occurring inorganic solid
Down
2
Element found in all living things
3
Nerve cell in the brain
6
Unit of electric potential
7
Measure of matter in an object
8
The Red Planet
9
Substance with pH above 7
10
Hottest planet in solar system