Across
1
Preserved remains of ancient life
3
Particle of light
4
Basic unit of life
5
Substance with pH below 7
9
Absolute temperature scale unit
10
Substance with pH above 7
11
Glass that splits light into spectrum
Down
2
Path of a planet around the sun
3
Tectonic landmass section
4
Reddish electrical conductor
6
Infectious microscopic agent
7
Curved glass that refracts light
8
Molten rock beneath Earth surface
11
Fourth state of matter