Across
1
Disturbance that transfers energy
3
Reddish electrical conductor
4
Substance with pH above 7
5
Glass that splits light into spectrum
8
Curved glass that refracts light
9
Element found in all living things
Down
2
Unit of heredity
3
Basic unit of life
5
Fourth state of matter
6
Path of a planet around the sun
7
Tectonic landmass section