Across
1
Glass that splits light into spectrum
4
Smallest unit of an element
5
Our home planet
6
Fourth state of matter
8
Infectious microscopic agent
11
Hottest planet in solar system
Down
2
Naturally occurring inorganic solid
3
Curved glass that refracts light
6
Positive particle in nucleus
7
The Red Planet
9
Magnetic metallic element
10
Gas form of a liquid