Across
1
Icy body with a tail near the sun
4
Fourth state of matter
6
Amplified beam of light
7
Chemical element in table salt
9
Unit of power
12
Tectonic landmass section
Down
2
Group of similar cells
3
Gas form of a liquid
5
Tissue that contracts for movement
8
Infectious microscopic agent
10
Basic unit of life
11
Smallest unit of an element