Across
1
Tectonic landmass section
5
Naturally occurring inorganic solid
6
Center of an atom or cell
7
Amplified beam of light
8
Basic unit of life
9
Positive particle in nucleus
11
Preserved remains of ancient life
Down
2
Form of thermal energy
3
Blocking of light by a celestial body
4
Biological catalyst
9
Fourth state of matter
10
Curved glass that refracts light
12
Unit of power
13
Element found in all living things