Across
1
Compound containing oxygen
4
Second lightest element
5
Amplified beam of light
7
Molten rock beneath Earth surface
Down
2
Gas form of a liquid
3
Absolute temperature scale unit
4
Form of thermal energy
6
Measure of matter in an object
Compound containing oxygen
Second lightest element
Amplified beam of light
Molten rock beneath Earth surface
Gas form of a liquid
Absolute temperature scale unit
Form of thermal energy
Measure of matter in an object