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Students write a short essay that compares the Permo-Triassic (Permo is short for Permian) mass extinction with the Cretaceous-Tertiary (Tertiary is the beginning of the Cenozoic) mass extinction. The use online resources and their textbooks as source material for their essay. Students must include information about the magnitude of the extinction events. Additionally students describe the groups of organisms that were impacted by the event. Students discuss the cause(s) of each the extinction event and compare the different causes. They explain how the cause impacted the different groups of organisms or why those particular groups were impacted. The discussion must include some of the organisms that never recovered from the extinction.
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