Across
1
Smallest unit of an element
2
Icy body with a tail near the sun
4
Gas form of a liquid
5
Tectonic landmass section
6
Glass that splits light into spectrum
9
Hottest planet in solar system
10
Infectious microscopic agent
Down
2
Solid with repeating atomic pattern
3
Molten rock beneath Earth surface
5
Particle of light
7
Unit of energy
8
Absolute temperature scale unit