Across
1
Glass that splits light into spectrum
4
Icy body with a tail near the sun
6
Form of thermal energy
7
Amplified beam of light
8
Unit of heredity
11
Solid with repeating atomic pattern
Down
2
Our home planet
3
Molten rock beneath Earth surface
5
Push or pull on an object
9
Measure of matter in an object
10
Positive particle in nucleus
12
Ball of burning gas in space