Across
1
Disturbance that transfers energy
3
Amplified beam of light
5
Gas form of a liquid
6
Center of an atom or cell
7
Magnetic metallic element
8
Group of similar cells
9
Unit of force
10
Positive particle in nucleus
Down
2
Hottest planet in solar system
4
Unit of energy
5
Infectious microscopic agent
9
Nerve cell in the brain
11
Basic unit of life