Across
1
Glass that splits light into spectrum
3
Form of thermal energy
5
Curved glass that refracts light
6
Unit of energy
7
Disturbance that transfers energy
10
Path of a planet around the sun
11
Biological catalyst
Down
1
Fourth state of matter
2
Absolute temperature scale unit
4
Mass per unit volume
5
Amplified beam of light
8
Second lightest element
9
Blocking of light by a celestial body