Across
1
Ball of burning gas in space
3
Blocking of light by a celestial body
4
Naturally occurring inorganic solid
5
Second lightest element
11
Group of similar cells
Down
2
Tectonic landmass section
3
Our home planet
4
The Red Planet
6
Unit of energy
7
Curved glass that refracts light
8
Unit of electric potential
9
Infectious microscopic agent
10
Molten rock beneath Earth surface