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14 Cards in this Set
- Front
- Back
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The largest division on the geologic time scale |
Era |
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Which part 9f geologic time lasted the longest |
Precambrian |
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How are the units of geologic time divided |
Era, period, epics |
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Which Era began with early invertebrates progressed to reptiles and ended in mass extinction |
Palozoic |
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What is the mesozoic Era known for |
Dinosaurs |
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During what time did mammals and birds first appeared |
Mesozoic |
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During which Era did trilobites live |
Palozoic |
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What is the first period of geologic time |
Cambrian |
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What time period did mammals appear |
Mesozoic |
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Changes in climate have caused what during earth's history |
Glacaion |
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What possibly caused the extinction of dinosaurs |
Large comet or asteroid |
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This division of geologic time had tropical climates and warm shallow seas |
Paleozoic |
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In what part of geologic time do humans live |
Cenozoic, quaternary, holocene |
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Geologic time is divided into units based on types of |
Organisms |
