Across
1
Fourth state of matter
3
Unit of electric potential
7
Measure of matter in an object
8
Tissue that contracts for movement
9
Center of an atom or cell
11
Substance with pH above 7
Down
1
Tectonic landmass section
2
Hottest planet in solar system
4
Solid with repeating atomic pattern
5
Magnetic metallic element
6
The Red Planet
10
Naturally occurring inorganic solid
12
Blocking of light by a celestial body
13
Compound containing oxygen