Across
1
Disturbance that transfers energy
4
Natural satellite of Earth
5
Element found in all living things
6
Fourth state of matter
8
Group of similar cells
11
Precious yellow metallic element
Down
2
Amplified beam of light
3
Unit of energy
6
Particle of light
7
Unit of electric potential
9
Substance with pH below 7
10
Tissue that contracts for movement