Across
1
Substance with pH below 7
4
Tectonic landmass section
7
Solid with repeating atomic pattern
9
The Red Planet
10
Disturbance that transfers energy
11
Substance with pH above 7
12
Absolute temperature scale unit
Down
2
Icy body with a tail near the sun
3
Chemical element in table salt
5
Form of thermal energy
6
Fourth state of matter
8
Mass per unit volume