Mass Extinctions in Earth History
Compare the five major mass extinction events in Earth history (End-Ordovician, Late Devonian, End-Permian, End-Triassic, K-Pg), describe proposed kill mechanisms for each (glaciation, oceanic anoxia, volcanic mega-eruptions, asteroid impact), and explain why mass extinctions, while catastrophic, also open ecological space for subsequent evolutionary radiations
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“Can your child explain that the asteroid that wiped out the dinosaurs was actually the fifth mass extinction in Earth history — and describe what happened in the worst one, which killed over 90% of all species?”
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- Activity. Compare the five major mass extinction events in Earth history (End-Ordovician, Late Devonian, End-Permian, End-Triassic, K-Pg), describe proposed kill mechanisms for each (glaciation, oceanic anoxia, volcanic mega-eruptions, asteroid impact), and explain why mass extinctions, while catastrophic, also open ecological space for subsequent evolutionary radiations
What to notice. Names all five major mass extinctions in chronological order with approximate dates • Describes the End-Permian extinction as the most severe and links it to the Siberian Traps volcanic eruption and its atmospheric consequences • Explains how each mass extinction was followed by an adaptive radiation — e.g. the K-Pg extinction removing non-avian dinosaurs allowed mammals to diversify and eventually produce humans
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Can your child explain that the asteroid that wiped out the dinosaurs was actually the fifth mass extinction in Earth history — and describe what happened in the worst one, which killed over 90% of all species?
Compare the five major mass extinction events in Earth history (End-Ordovician, Late Devonian, End-Permian, End-Triassic, K-Pg), describe proposed kill mechanisms for each (glaciation, oceanic anoxia, volcanic mega-eruptions, asteroid impact), and explain why mass extinctions, while catastrophic, also open ecological space for subsequent evolutionary radiations
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Check understanding
- Names all five major mass extinctions in chronological order with approximate dates
- Describes the End-Permian extinction as the most severe and links it to the Siberian Traps volcanic eruption and its atmospheric consequences
- Explains how each mass extinction was followed by an adaptive radiation — e.g. the K-Pg extinction removing non-avian dinosaurs allowed mammals to diversify and eventually produce humans
“Can your child explain that the asteroid that wiped out the dinosaurs was actually the fifth mass extinction in Earth history — and describe what happened in the worst one, which killed over 90% of all species?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- Dinosaurs & Paleontology
- Age range
- Ages 12–14