Across
1
Unit of electric potential
3
Second lightest element
4
Unit of heredity
5
Positive particle in nucleus
8
Substance with pH below 7
9
Tissue that contracts for movement
10
Fourth state of matter
Down
1
Hottest planet in solar system
2
Naturally occurring inorganic solid
6
Mass per unit volume
7
Gas form of a liquid
11
Unit of energy