Across
1
Unit of power
3
Amplified beam of light
4
Reddish electrical conductor
5
Hottest planet in solar system
7
Tissue that contracts for movement
8
Form of thermal energy
9
Path of a planet around the sun
Down
2
Tectonic landmass section
3
Curved glass that refracts light
5
Unit of electric potential
6
Group of similar cells