Across
1
Center of an atom or cell
5
The Red Planet
7
Unit of electric potential
8
Unit of energy
9
Reddish electrical conductor
11
Path of a planet around the sun
Down
2
Icy body with a tail near the sun
3
Basic unit of life
4
Glass that splits light into spectrum
6
Absolute temperature scale unit
9
Element found in all living things
10
Precious yellow metallic element