Across
1
Nerve cell in the brain
3
Solid with repeating atomic pattern
6
Chemical element in table salt
8
Gas form of a liquid
9
Infectious microscopic agent
11
Force that attracts objects together
13
Tectonic landmass section
Down
2
Ball of burning gas in space
4
Reddish electrical conductor
5
Compound containing oxygen
7
Biological catalyst
10
Measure of matter in an object
12
Basic unit of life