Across
1
Infectious microscopic agent
4
Amplified beam of light
5
Biological catalyst
6
Unit of power
7
Disturbance that transfers energy
12
Unit of energy
Down
2
Fourth state of matter
3
Blocking of light by a celestial body
8
Particle of light
9
Unit of force
10
Tectonic landmass section
11
Second lightest element