Across
1
Gas essential for breathing
3
Tectonic landmass section
6
Measure of matter in an object
7
Biological catalyst
Down
1
Compound containing oxygen
2
Hottest planet in solar system
4
Unit of power
5
Mass per unit volume
Gas essential for breathing
Tectonic landmass section
Measure of matter in an object
Biological catalyst
Compound containing oxygen
Hottest planet in solar system
Unit of power
Mass per unit volume