Across
1
Tissue that contracts for movement
2
Reddish electrical conductor
5
Mass per unit volume
6
Precious yellow metallic element
8
Form of thermal energy
10
Absolute temperature scale unit
Down
2
Solid with repeating atomic pattern
3
Unit of heredity
4
Smallest unit of an element
7
Unit of force
8
Second lightest element
9
Ball of burning gas in space