Across
1
Smallest unit of an element
3
Absolute temperature scale unit
4
Basic unit of life
6
Icy body with a tail near the sun
7
Our home planet
10
Element found in all living things
Down
2
Tectonic landmass section
4
Reddish electrical conductor
5
Group of similar cells
8
Compound containing oxygen
9
Substance with pH above 7
11
Unit of electric potential
12
Unit of heredity