Across
1
Natural satellite of Earth
3
Solid with repeating atomic pattern
4
Molten rock beneath Earth surface
5
Tectonic landmass section
8
Blocking of light by a celestial body
Down
2
Biological catalyst
3
Element found in all living things
4
The Red Planet
6
Our home planet
7
Second lightest element
9
Unit of electric potential
10
Reddish electrical conductor