Across
1
Solid with repeating atomic pattern
4
Biological catalyst
7
Glass that splits light into spectrum
10
Blocking of light by a celestial body
11
Compound containing oxygen
Down
2
The Red Planet
3
Hottest planet in solar system
5
Form of thermal energy
6
Measure of matter in an object
8
Mass per unit volume
9
Push or pull on an object
12
Reddish electrical conductor
13
Unit of electric potential