Across
1
Form of thermal energy
3
Measure of matter in an object
5
Precious yellow metallic element
6
Mass per unit volume
7
Tissue that contracts for movement
Down
1
Second lightest element
2
Substance with pH above 7
4
Hottest planet in solar system
8
Icy body with a tail near the sun
9
Naturally occurring inorganic solid
10
Ball of burning gas in space