Across
1
Second lightest element
4
Natural satellite of Earth
6
Basic unit of life
7
Mass per unit volume
Down
1
Form of thermal energy
2
Unit of energy
3
Tissue that contracts for movement
5
Positive particle in nucleus
Second lightest element
Natural satellite of Earth
Basic unit of life
Mass per unit volume
Form of thermal energy
Unit of energy
Tissue that contracts for movement
Positive particle in nucleus