Across
1
Unit of heredity
4
Positive particle in nucleus
5
Gas form of a liquid
8
Natural satellite of Earth
10
Compound containing oxygen
11
Absolute temperature scale unit
12
Reddish electrical conductor
Down
2
Our home planet
3
Particle of light
6
Disturbance that transfers energy
7
Amplified beam of light
9
Unit of force
13
Unit of energy