Across
1
Center of an atom or cell
5
Disturbance that transfers energy
6
Gas form of a liquid
8
Biological catalyst
9
Curved glass that refracts light
11
Tectonic landmass section
Down
2
Basic unit of life
3
Solid with repeating atomic pattern
4
Naturally occurring inorganic solid
7
Group of similar cells
10
Absolute temperature scale unit