Across
1
Unit of heredity
3
Glass that splits light into spectrum
7
Absolute temperature scale unit
8
Element found in all living things
9
Substance with pH below 7
10
Center of an atom or cell
Down
2
Hottest planet in solar system
4
Path of a planet around the sun
5
Tectonic landmass section
6
Tissue that contracts for movement
11
Preserved remains of ancient life