Across
1
Center of an atom or cell
5
Naturally occurring inorganic solid
6
Reddish electrical conductor
10
Preserved remains of ancient life
Down
2
Precious yellow metallic element
3
Magnetic metallic element
4
Group of similar cells
6
Icy body with a tail near the sun
7
Compound containing oxygen
8
Unit of power
9
Tectonic landmass section
11
The Red Planet