Across
1
Preserved remains of ancient life
3
Positive particle in nucleus
4
The Red Planet
5
Group of similar cells
6
Curved glass that refracts light
7
Reddish electrical conductor
8
Solid with repeating atomic pattern
Down
2
Mass per unit volume
3
Tectonic landmass section
4
Naturally occurring inorganic solid
9
Infectious microscopic agent
10
Gas form of a liquid
11
Amplified beam of light