Across
1
Preserved remains of ancient life
3
Element found in all living things
5
Infectious microscopic agent
6
Our home planet
9
Unit of electric potential
10
Substance with pH above 7
11
Icy body with a tail near the sun
Down
2
The Red Planet
4
Amplified beam of light
5
Hottest planet in solar system
7
Absolute temperature scale unit
8
Positive particle in nucleus
12
Molten rock beneath Earth surface
13
Unit of power