Across
1
Infectious microscopic agent
4
Substance with pH above 7
5
Fourth state of matter
6
Glass that splits light into spectrum
7
Icy body with a tail near the sun
8
Tissue that contracts for movement
10
Center of an atom or cell
11
Amplified beam of light
13
Gas form of a liquid
Down
2
Substance with pH below 7
3
Solid with repeating atomic pattern
7
Basic unit of life
8
Naturally occurring inorganic solid
9
Second lightest element
12
Measure of matter in an object