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10 Cards in this Set
- Front
- Back
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-The Earth and universe began _ _ years ago
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-4.6 Billion
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-from 4.6 bill. ya to 0.54 billion years ago is called the _
-4.6 bill. years ago to 2.5 billion years ago is called the _ |
-Precambian
-Archean |
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-2.5 billion years ago to 0.54 billion years ago is called the _
-though we don't know exactly when this period ends, some ppl call around the archean time the _ |
-Proterozoic-
-Hadean |
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-the period from 0.54 billion yrs ago to present is called the _
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-Phanerozoic
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-The Phanerozoic is broken up into these 3 eras: (oldest to youngest)
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1.Paleozoic
2.Mesozoic 3.Cenozoic |
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-Paleozoic is broken up into these parts: (oldest to youngest)
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1.Cambrian
2.Ordovician 3.Silurian 4.Devonian 5.Carboniferous 6.Permian |
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-Carboniferous is broken up into 2 parts (o to y)
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1.Mississippian
2.Pennsylvanian |
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-The Mesozoic Era is broken up into 3 parts: (o to y)
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1.Triassic
2.Jurassic 3.Cretaceous |
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-Cenozoic Era is broken up into 2 periods:
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1.Neogene
2.Paleogene |
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-our current epoch is called either the _ or _
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-recent; Holocene
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