Across
1
Substance with pH below 7
3
Unit of force
4
Glass that splits light into spectrum
6
Basic unit of life
9
Positive particle in nucleus
11
Preserved remains of ancient life
Down
2
Push or pull on an object
3
Center of an atom or cell
5
Tissue that contracts for movement
7
The Red Planet
8
Gas form of a liquid
10
Tectonic landmass section