Across
1
Molten rock beneath Earth surface
4
Natural satellite of Earth
5
Group of similar cells
7
Gas essential for breathing
Down
2
Substance with pH above 7
3
Element found in all living things
6
Mass per unit volume
8
Unit of power
Molten rock beneath Earth surface
Natural satellite of Earth
Group of similar cells
Gas essential for breathing
Substance with pH above 7
Element found in all living things
Mass per unit volume
Unit of power