Across
1
Particle of light
3
Precious yellow metallic element
4
Chemical element in table salt
6
Blocking of light by a celestial body
9
Gas form of a liquid
11
Substance with pH below 7
Down
2
Mass per unit volume
5
Unit of force
7
Tissue that contracts for movement
8
Push or pull on an object
9
Unit of electric potential
10
Group of similar cells