Across
1
Substance with pH below 7
3
Our home planet
5
Unit of force
7
Compound containing oxygen
9
Magnetic metallic element
Down
2
Form of thermal energy
4
Element found in all living things
5
Nerve cell in the brain
6
Icy body with a tail near the sun
7
Path of a planet around the sun
8
Substance with pH above 7
10
Unit of power