Across
1
Glass that splits light into spectrum
4
Center of an atom or cell
6
Precious yellow metallic element
7
Unit of power
8
Blocking of light by a celestial body
11
Nerve cell in the brain
Down
2
Biological catalyst
3
Ball of burning gas in space
5
Push or pull on an object
9
Naturally occurring inorganic solid
10
Amplified beam of light