Across
1
Group of similar cells
3
Gas form of a liquid
5
Blocking of light by a celestial body
8
Amplified beam of light
9
Our home planet
12
Naturally occurring inorganic solid
Down
2
Tectonic landmass section
3
Infectious microscopic agent
4
Second lightest element
6
Nerve cell in the brain
7
Gas essential for breathing
10
Chemical element in table salt
11
Reddish electrical conductor