Across
1
Gas form of a liquid
4
Tissue that contracts for movement
5
Nerve cell in the brain
6
Positive particle in nucleus
8
Mass per unit volume
9
Solid with repeating atomic pattern
Down
2
Our home planet
3
Element found in all living things
5
Center of an atom or cell
7
Magnetic metallic element
10
Reddish electrical conductor
11
Unit of electric potential
12
Infectious microscopic agent