Across
1
Push or pull on an object
3
Solid with repeating atomic pattern
4
Naturally occurring inorganic solid
5
Substance with pH above 7
7
Center of an atom or cell
8
Nerve cell in the brain
10
Hottest planet in solar system
Down
2
Force that attracts objects together
3
Reddish electrical conductor
4
Tissue that contracts for movement
6
Gas essential for breathing
9
Fourth state of matter