Across
1
The Red Planet
4
Molten rock beneath Earth surface
5
Reddish electrical conductor
6
Gas essential for breathing
7
Absolute temperature scale unit
Down
2
Mass per unit volume
3
Fourth state of matter
8
Tectonic landmass section
The Red Planet
Molten rock beneath Earth surface
Reddish electrical conductor
Gas essential for breathing
Absolute temperature scale unit
Mass per unit volume
Fourth state of matter
Tectonic landmass section