Across
1
Tissue that contracts for movement
3
Ball of burning gas in space
4
Element found in all living things
5
Positive particle in nucleus
7
Push or pull on an object
9
Blocking of light by a celestial body
Down
2
Reddish electrical conductor
4
Basic unit of life
6
Unit of electric potential
8
Smallest unit of an element
10
Mass per unit volume