Across
1
Unit of energy
3
Absolute temperature scale unit
6
The Red Planet
8
Element found in all living things
9
Nerve cell in the brain
10
Ball of burning gas in space
Down
2
Unit of heredity
4
Preserved remains of ancient life
5
Center of an atom or cell
6
Molten rock beneath Earth surface
7
Unit of electric potential
11
Magnetic metallic element