Across
1
Ball of burning gas in space
3
Natural satellite of Earth
4
Tectonic landmass section
6
Icy body with a tail near the sun
7
Hottest planet in solar system
9
Group of similar cells
11
Nerve cell in the brain
Down
2
Mass per unit volume
4
Fourth state of matter
5
Biological catalyst
8
Absolute temperature scale unit
10
Magnetic metallic element