Across
1
Glass that splits light into spectrum
3
Reddish electrical conductor
6
Solid with repeating atomic pattern
8
Blocking of light by a celestial body
9
Compound containing oxygen
10
Basic unit of life
11
Unit of heredity
Down
2
Our home planet
4
Substance with pH below 7
5
Molten rock beneath Earth surface
7
Center of an atom or cell
12
Second lightest element
13
Biological catalyst