Across
1
Tectonic landmass section
4
Absolute temperature scale unit
5
Amplified beam of light
6
Push or pull on an object
11
Biological catalyst
Down
2
Substance with pH above 7
3
Center of an atom or cell
7
Basic unit of life
8
Curved glass that refracts light
9
Nerve cell in the brain
10
Unit of energy