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Four Eras
Classify events from earth history into four eras of geologic time
Question | Answer |
---|---|
4.5 bya-550 mya | Precambrian |
550 mya-250 mya | Paleozoic |
250 mya-65 mya | Mesozoic |
65 mya-present | Cenozoic |
moon and ocean forms | Precambrian |
bacterial algae begin producing oxygen | Precambrian |
"Cambrian explosion" (beginning of larger, more complicated life forms) | Paleozoic |
First amphibians | Paleozoic |
Appalachians form | Paleozoic |
Pangaea forms | Paleozoic |
Giant Permian extinction | Paleozoic |
Reptiles and dinos dominate | Mesozoic |
First birds and flowering plants | Mesozoic |
Asteroid collision and increase in volcanic activity that caused the extinction of dinosaurs | Mesozoic |
mammals become dominant | Cenozoic |
Alps/Himalayas form | Cenozoic |
Humans evolve, end of last ice age | Cenozoic |