When the Earth Was Purple | Eons

PBS Learning Media
Contributed By
PBS Learning Media
Resource Type
Classroom Material
Keywords
pbs digital studios eons purple green pigment chlorophyll color photosynthesis photons visible spectrum green light purple earth hypothesis halobacteria archaea extremophile retinal light-sensitive pigment archaean eon microbe shil dassarma microbe cyanobacteria oxygen great oxygenation event
Subjects
Science
Grade Levels
Grade 9 Grade 10 Grade 11 Grade 12
Related Resources

When the Earth Was Purple | Eons

Besides the blue of the oceans, the dominant color of our planet, as we know it, is green. But imagine a time when the Earth looked a little … purple.
Publisher
PBS Learning Media

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