Across
1
Reddish electrical conductor
4
Molten rock beneath Earth surface
5
Preserved remains of ancient life
6
Chemical element in table salt
8
Unit of heredity
9
Glass that splits light into spectrum
10
Unit of power
11
Tissue that contracts for movement
Down
2
Center of an atom or cell
3
Second lightest element
6
Ball of burning gas in space
7
Measure of matter in an object