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Cards In This Set
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Following the demise of most Mesozoic reptiles, what were the 4 principle directions that mammals followed in their development and specialization?
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1) increase in size
2) increase in brain capacity
3) specialization of teeth
4) specialization of limbs
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Compare the geologic events that occurred along the eastern and western margins of North America during the Cenozoic era.
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Lots sedimentation/eroding Rocky Mntns/sediment Great Plain /crustal movement= Basin&Range Province/Volcanic actvty/Coast ranges&Sierra Nevada formed
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On each continent, large "core areas" of Precambrian rocks called, ______, dominate the surface, mostly as deformed metamorphic rocks.
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Shields
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During the process called, ________, gases that were formerly dissolved in molten rock are released.
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Outgasing
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The most common Precambrian fossils are ___________.
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Stromatolites
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What was the source of the gases that formed Earth's original atmosphere?
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Volcanic outgasing
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What were the gases that most likely made up the original atmosphere?
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Water vapor
carbon dioxide
nitrogen &
trace gases (other)
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Where did the significant percentage of oxygen in Earth's present atmosphere come from?
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Green plants releasing oxygen during photosynthesis.
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Name the geologic era:
a) humans develop
b) 1st one-celled organisms
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A) Cenozoic
b) Precambrian
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Name the geologic era:
a) first birds
b) first fish
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A) Mesozoic
b) Paleozoic
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