Across
1
Unit of energy
3
Element found in all living things
5
Infectious microscopic agent
6
Fourth state of matter
7
Tissue that contracts for movement
10
Positive particle in nucleus
Down
2
Natural satellite of Earth
4
Smallest unit of an element
5
Hottest planet in solar system
8
Second lightest element
9
Form of thermal energy
11
Gas form of a liquid
12
Substance with pH below 7