Across
1
Compound containing oxygen
5
Disturbance that transfers energy
6
Smallest unit of an element
8
Positive particle in nucleus
9
Infectious microscopic agent
11
Absolute temperature scale unit
13
Form of thermal energy
Down
2
Center of an atom or cell
3
Naturally occurring inorganic solid
4
Icy body with a tail near the sun
7
Measure of matter in an object
10
Group of similar cells
12
Particle of light