Across
1
Ball of burning gas in space
2
Natural satellite of Earth
3
Group of similar cells
6
Nerve cell in the brain
7
Positive particle in nucleus
10
Disturbance that transfers energy
11
Tectonic landmass section
Down
2
Tissue that contracts for movement
4
Absolute temperature scale unit
5
Naturally occurring inorganic solid
8
Glass that splits light into spectrum
9
Biological catalyst