Across
1
Gas essential for breathing
4
Mass per unit volume
5
Form of thermal energy
7
Naturally occurring inorganic solid
Down
1
Compound containing oxygen
2
Biological catalyst
3
Absolute temperature scale unit
6
Icy body with a tail near the sun
Gas essential for breathing
Mass per unit volume
Form of thermal energy
Naturally occurring inorganic solid
Compound containing oxygen
Biological catalyst
Absolute temperature scale unit
Icy body with a tail near the sun