Across
1
Glass that splits light into spectrum
3
Unit of heredity
5
Measure of matter in an object
6
Form of thermal energy
7
Smallest unit of an element
8
Gas form of a liquid
Down
1
Positive particle in nucleus
2
Ball of burning gas in space
4
Icy body with a tail near the sun
9
Hottest planet in solar system
10
Natural satellite of Earth