Across
1
Infectious microscopic agent
3
Naturally occurring inorganic solid
6
Unit of electric potential
8
Chemical element in table salt
11
Unit of energy
13
Biological catalyst
Down
2
Glass that splits light into spectrum
4
Absolute temperature scale unit
5
Hottest planet in solar system
7
Nerve cell in the brain
9
Group of similar cells
10
Reddish electrical conductor
12
Preserved remains of ancient life