Across
1
Form of thermal energy
3
Absolute temperature scale unit
6
Unit of force
8
Solid with repeating atomic pattern
10
Center of an atom or cell
11
Disturbance that transfers energy
12
Molten rock beneath Earth surface
Down
2
Biological catalyst
4
Nerve cell in the brain
5
Smallest unit of an element
7
Our home planet
9
Amplified beam of light