Across
1
Tectonic landmass section
2
Natural satellite of Earth
4
Unit of heredity
5
Gas form of a liquid
7
Solid with repeating atomic pattern
9
Center of an atom or cell
10
Icy body with a tail near the sun
Down
1
Positive particle in nucleus
2
Tissue that contracts for movement
3
Form of thermal energy
6
Blocking of light by a celestial body
8
Molten rock beneath Earth surface