Across
1
Chemical element in table salt
3
Curved glass that refracts light
5
Positive particle in nucleus
8
Molten rock beneath Earth surface
11
Path of a planet around the sun
Down
2
Reddish electrical conductor
4
Absolute temperature scale unit
5
Glass that splits light into spectrum
6
Amplified beam of light
7
Unit of power
9
Element found in all living things
10
Form of thermal energy