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Four Eras

Classify events from earth history into four eras of geologic time

QuestionAnswer
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
Created by: JoeBounda
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