Across
1
Glass that splits light into spectrum
2
Reddish electrical conductor
4
Unit of force
5
Curved glass that refracts light
7
Biological catalyst
Down
2
Icy body with a tail near the sun
3
Blocking of light by a celestial body
6
Push or pull on an object
8
Substance with pH above 7
9
Nerve cell in the brain
10
Hottest planet in solar system
11
Solid with repeating atomic pattern