Across
1
Ball of burning gas in space
5
Mass per unit volume
6
Molten rock beneath Earth surface
10
Substance with pH above 7
Down
2
Substance with pH below 7
3
Gas form of a liquid
4
Amplified beam of light
7
Icy body with a tail near the sun
8
Hottest planet in solar system
9
Glass that splits light into spectrum