Across
1
Fourth state of matter
4
Push or pull on an object
7
Gas form of a liquid
8
Substance with pH above 7
10
Group of similar cells
11
Naturally occurring inorganic solid
Down
2
The Red Planet
3
Blocking of light by a celestial body
5
Unit of force
6
Tectonic landmass section
9
Positive particle in nucleus
12
Amplified beam of light
13
Measure of matter in an object