Across
1
Solid with repeating atomic pattern
4
Glass that splits light into spectrum
5
Biological catalyst
6
Hottest planet in solar system
10
Push or pull on an object
12
Substance with pH below 7
Down
2
Substance with pH above 7
3
Blocking of light by a celestial body
7
Second lightest element
8
Form of thermal energy
9
Unit of heredity
11
Naturally occurring inorganic solid