Across
1
Unit of power
3
Second lightest element
4
Hottest planet in solar system
6
Element found in all living things
9
The Red Planet
10
Curved glass that refracts light
Down
2
Naturally occurring inorganic solid
3
Form of thermal energy
5
Unit of energy
7
Glass that splits light into spectrum
8
Fourth state of matter
10
Amplified beam of light