Across
1
Form of thermal energy
3
Absolute temperature scale unit
4
Glass that splits light into spectrum
6
Biological catalyst
9
Nerve cell in the brain
10
Curved glass that refracts light
11
Mass per unit volume
12
Disturbance that transfers energy
Down
2
Our home planet
4
Tectonic landmass section
5
Positive particle in nucleus
7
Unit of heredity
8
Center of an atom or cell