Across
1
Unit of heredity
4
Smallest unit of an element
5
Infectious microscopic agent
7
Positive particle in nucleus
9
Unit of power
Down
2
Disturbance that transfers energy
3
Amplified beam of light
5
Gas form of a liquid
6
Nerve cell in the brain
7
Tectonic landmass section
8
Unit of electric potential
10
Mass per unit volume