Across
1
Center of an atom or cell
4
Substance with pH below 7
6
Glass that splits light into spectrum
7
Disturbance that transfers energy
8
Substance with pH above 7
10
Curved glass that refracts light
Down
2
Icy body with a tail near the sun
3
Element found in all living things
5
Our home planet
6
Fourth state of matter
9
Absolute temperature scale unit