Across
1
Natural satellite of Earth
3
Tectonic landmass section
4
Path of a planet around the sun
6
Second lightest element
7
Ball of burning gas in space
8
Chemical element in table salt
Down
2
Precious yellow metallic element
3
Positive particle in nucleus
5
Group of similar cells
9
Molten rock beneath Earth surface
10
Icy body with a tail near the sun