Across
1
Glass that splits light into spectrum
3
Form of thermal energy
5
Substance with pH above 7
6
Unit of heredity
10
Measure of matter in an object
11
Curved glass that refracts light
Down
2
Hottest planet in solar system
4
Blocking of light by a celestial body
6
Precious yellow metallic element
7
Disturbance that transfers energy
8
Molten rock beneath Earth surface
9
Unit of power
12
Preserved remains of ancient life