Across
1
Center of an atom or cell
3
Disturbance that transfers energy
6
Unit of heredity
8
Basic unit of life
10
Amplified beam of light
11
Infectious microscopic agent
Down
2
Fourth state of matter
4
Unit of energy
5
Unit of electric potential
7
Blocking of light by a celestial body
9
Hottest planet in solar system
12
Mass per unit volume