Across
1
Naturally occurring inorganic solid
2
Infectious microscopic agent
4
Mass per unit volume
8
Particle of light
10
Substance with pH above 7
Down
2
Unit of electric potential
3
Center of an atom or cell
5
Ball of burning gas in space
6
Smallest unit of an element
7
Our home planet
8
Tectonic landmass section
9
Compound containing oxygen
11
Solid with repeating atomic pattern
12
Measure of matter in an object