Across
1
Ball of burning gas in space
3
Disturbance that transfers energy
5
Solid with repeating atomic pattern
6
Form of thermal energy
Down
2
Molten rock beneath Earth surface
3
Unit of power
4
Nerve cell in the brain
7
Our home planet
8
Measure of matter in an object
9
Unit of energy
10
Icy body with a tail near the sun