Across
1
Nerve cell in the brain
4
Tissue that contracts for movement
5
Glass that splits light into spectrum
6
Form of thermal energy
7
Ball of burning gas in space
9
Molten rock beneath Earth surface
Down
2
Solid with repeating atomic pattern
3
Disturbance that transfers energy
5
Positive particle in nucleus
8
Second lightest element
10
Absolute temperature scale unit
11
Measure of matter in an object