Across
1
Naturally occurring inorganic solid
4
Chemical element in table salt
6
Magnetic metallic element
7
Disturbance that transfers energy
10
Precious yellow metallic element
11
Unit of force
Down
2
Substance with pH below 7
3
Preserved remains of ancient life
5
Our home planet
8
Gas essential for breathing
9
Icy body with a tail near the sun