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25 Cards in this Set
- Front
- Back
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Paleontologists
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People who study earth's past, but with emphasis on life history
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Differentiation
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separation of earth into layers based on density
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Outgassing
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source of water vapor, co2, nitrogen, and other gases
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Cratons
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earliest felsic continental drift now found in the ancient cores of continents
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Paleogeoraphy
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ancient geography of an early planet
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Shield
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places the craton crops out of surface
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Greenstone
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metamorphosed volcanic rock
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Platform
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cratons covered by younger rock together
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Micro-continents
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small proterozoic continents
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Microbes
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ancient microorganisms
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Metabolism
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chemical work of the cells
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RNA world hypothesis
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a possibility that RNA is more ancient than DNA
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Last Universal Common Ancestor
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prokaryotic cell that differed from first living cells since it's genetic code was based on DNA
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Cyanobacteria
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oldest known fossils that were from organisms to do photosynthesis
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Stromoatolites
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reef-like structures that Cyanobacteria lived in
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Marine Transgression
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sea level rises over the land
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Marine Regression
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sea level restraints
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Facies
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characteristic rock layers
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Orogeny
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mountain building event
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Mutation
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random changes in an organs genes
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Natural Selection
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mechanism for evolution
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Phanerozoic Eon
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divided into three eras- Paleozoic, Mesozoic, Cenozoic
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Adaptive Radiation |
The process in which many new species evolve in a short period of time to fill available niches |
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Tropical |
Very warm climate |
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Amniote Egg |
contains shell and contains all nutrients and water that the embryo needs |
