Across
1
Icy body with a tail near the sun
4
Absolute temperature scale unit
6
Naturally occurring inorganic solid
7
Infectious microscopic agent
9
Substance with pH above 7
10
Our home planet
Down
2
Preserved remains of ancient life
3
Blocking of light by a celestial body
5
Mass per unit volume
8
Chemical element in table salt
11
Reddish electrical conductor