Across
1
Tissue that contracts for movement
5
Mass per unit volume
6
Tectonic landmass section
8
Substance with pH below 7
9
Icy body with a tail near the sun
11
Chemical element in table salt
Down
2
Smallest unit of an element
3
Fourth state of matter
4
Group of similar cells
7
Substance with pH above 7
10
Gas form of a liquid