Across
1
Second lightest element
4
Gas form of a liquid
6
Path of a planet around the sun
Down
2
Chemical element in table salt
3
Compound containing oxygen
5
Unit of power
7
Substance with pH below 7
8
Molten rock beneath Earth surface
Second lightest element
Gas form of a liquid
Path of a planet around the sun
Chemical element in table salt
Compound containing oxygen
Unit of power
Substance with pH below 7
Molten rock beneath Earth surface