Across
1
Amplified beam of light
3
Nerve cell in the brain
5
Biological catalyst
6
Tectonic landmass section
7
Gas form of a liquid
8
Reddish electrical conductor
9
Ball of burning gas in space
Down
2
Blocking of light by a celestial body
3
Center of an atom or cell
4
Infectious microscopic agent
10
Tissue that contracts for movement