Across
1
Infectious microscopic agent
3
Compound containing oxygen
5
Gas essential for breathing
7
Reddish electrical conductor
8
Solid with repeating atomic pattern
12
Glass that splits light into spectrum
Down
2
Mass per unit volume
4
Icy body with a tail near the sun
6
Tissue that contracts for movement
9
Form of thermal energy
10
Chemical element in table salt
11
Gas form of a liquid