Across
1
Infectious microscopic agent
3
Gas form of a liquid
5
Our home planet
6
The Red Planet
10
Basic unit of life
11
Particle of light
Down
2
Preserved remains of ancient life
3
Hottest planet in solar system
4
Center of an atom or cell
7
Force that attracts objects together
8
Fourth state of matter
9
Icy body with a tail near the sun