Across
1
Natural satellite of Earth
4
Blocking of light by a celestial body
6
Unit of electric potential
9
Substance with pH below 7
11
Chemical element in table salt
Down
2
Unit of energy
3
Unit of heredity
5
Disturbance that transfers energy
7
Tissue that contracts for movement
8
Fourth state of matter
10
Icy body with a tail near the sun