Across
1
Glass that splits light into spectrum
4
Magnetic metallic element
5
Substance with pH above 7
7
Curved glass that refracts light
8
Disturbance that transfers energy
9
Hottest planet in solar system
Down
1
Positive particle in nucleus
2
Ball of burning gas in space
3
Blocking of light by a celestial body
6
Molten rock beneath Earth surface
10
Group of similar cells
11
Unit of energy