Across
1
Substance with pH below 7
2
Compound containing oxygen
5
Unit of force
6
Magnetic metallic element
8
Natural satellite of Earth
10
Blocking of light by a celestial body
Down
2
Path of a planet around the sun
3
Biological catalyst
4
Precious yellow metallic element
7
Disturbance that transfers energy
9
Icy body with a tail near the sun