Across
1
Tectonic landmass section
4
Naturally occurring inorganic solid
6
Unit of force
9
Fourth state of matter
10
Infectious microscopic agent
11
Compound containing oxygen
12
Biological catalyst
Down
2
Unit of energy
3
Smallest unit of an element
5
Amplified beam of light
7
Element found in all living things
8
Blocking of light by a celestial body
13
Gas essential for breathing