Across
1
Group of similar cells
3
Molten rock beneath Earth surface
4
The Red Planet
6
Disturbance that transfers energy
7
Center of an atom or cell
Down
2
Tectonic landmass section
4
Naturally occurring inorganic solid
5
Tissue that contracts for movement
8
Infectious microscopic agent
9
Unit of heredity
10
Preserved remains of ancient life