Across
1
Disturbance that transfers energy
4
Blocking of light by a celestial body
5
Substance with pH above 7
9
Glass that splits light into spectrum
10
Absolute temperature scale unit
11
Tectonic landmass section
Down
2
Reddish electrical conductor
3
Amplified beam of light
6
Hottest planet in solar system
7
Biological catalyst
8
Preserved remains of ancient life
12
Unit of power