Across
1
Group of similar cells
3
Naturally occurring inorganic solid
5
Smallest unit of an element
9
Unit of electric potential
11
Biological catalyst
Down
2
Glass that splits light into spectrum
3
The Red Planet
4
Unit of heredity
6
Preserved remains of ancient life
7
Measure of matter in an object
8
Magnetic metallic element
10
Tectonic landmass section