Across
1
Glass that splits light into spectrum
3
Disturbance that transfers energy
5
Molten rock beneath Earth surface
7
Reddish electrical conductor
8
Amplified beam of light
9
Center of an atom or cell
Down
2
Smallest unit of an element
4
Gas form of a liquid
6
Absolute temperature scale unit
10
Group of similar cells
11
Unit of electric potential
12
Nerve cell in the brain
13
Preserved remains of ancient life