Across
1
Substance with pH below 7
3
Push or pull on an object
4
Blocking of light by a celestial body
10
Glass that splits light into spectrum
Down
2
Disturbance that transfers energy
3
Preserved remains of ancient life
5
Icy body with a tail near the sun
6
Biological catalyst
7
Reddish electrical conductor
8
Second lightest element
9
Gas form of a liquid