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Created by Annabel Maher
about 7 years ago
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Mass Extinction Event: The phenomenon in which a large number of species of life on earth become extinct in a relatively short period of time. There have been five mass extinction events: 1. Ordovician 2. Devonian 3. Permian-Triassic 4. Triassic-Jurassic 5. Cretaceous-Paleogene
450-440 million years ago cause: continental drift/glaciation 60%-70% of species went extinct
375-360 million years ago cause: extreme climate change (global cooling) 75% of species went extinct
251 million years ago cause: meteor impacts, volcanic eruptions, global warming 90%-96% of species went extinct
200 million years ago cause: extreme volcanic activity 60%-70% of species went extinct
65.5 million years ago cause: asteroid collision, debris blocked the sun 75% of species went extinct
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