Across
1
Positive particle in nucleus
5
Substance with pH above 7
6
Tissue that contracts for movement
7
Magnetic metallic element
10
Substance with pH below 7
12
Unit of force
Down
2
Reddish electrical conductor
3
Particle of light
4
Chemical element in table salt
8
Form of thermal energy
9
Blocking of light by a celestial body
11
Natural satellite of Earth