Across
1
Smallest unit of an element
4
Blocking of light by a celestial body
5
Tissue that contracts for movement
8
Solid with repeating atomic pattern
9
Mass per unit volume
Down
2
Tectonic landmass section
3
Chemical element in table salt
6
Substance with pH below 7
7
Curved glass that refracts light
10
Gas form of a liquid
11
Hottest planet in solar system