Across
1
Naturally occurring inorganic solid
2
Unit of heredity
5
Gas form of a liquid
8
Natural satellite of Earth
9
Solid with repeating atomic pattern
Down
2
Force that attracts objects together
3
Preserved remains of ancient life
4
Curved glass that refracts light
6
Fourth state of matter
7
Center of an atom or cell
9
Icy body with a tail near the sun