Across
1
Natural satellite of Earth
3
Icy body with a tail near the sun
4
Substance with pH above 7
8
Infectious microscopic agent
9
Tectonic landmass section
10
Preserved remains of ancient life
Down
2
Path of a planet around the sun
5
Unit of energy
6
Absolute temperature scale unit
7
Basic unit of life
11
The Red Planet
12
Precious yellow metallic element