Learning Intention: 8.ESS2.1

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Presentation transcript:

Learning Intention: 8.ESS2.1 Science 8th Grade Notes: Standard 16 Learning Intention: 8.ESS2.1 Analyze and interpret data to support the assertion that rapid or gradual geographic changes lead to drastic population changes and extinction events. Terms/phrases to Investigate geographic changes, population changes, extinction events Crosscutting Concepts Patterns, Cause and Effect, Stability and Change Success Criteria/I Can Statement By the end of this unit I will be able to say... ...I can explain how geological changes can effect populations and/or cause extinctions.

Phenomenon What caused these extinctions? Get into groups. Maybe do some online research. Discuss. Geologic Periods There have been (at least) five major extinction events in our planet’s history. 1) Ordovician-Silurian Event (439 million yrs ago) ---approx. 86% of all life on Earth went extinct. 5 2) Devonian Event (364 million yrs ago) ---approx. 75% of all life on Earth went extinct 4 3) Permian-Triassic Event (250 million yrs ago) ---approx. 96% of all life on Earth went extinct 3 2 4) Triassic-Jurassic Event (210 million yrs ago) ---approx. 50% of all life on Earth went extinct 1 5) Cretaceous-Paleogen event (65 million yrs ago) ---approx. 76% of all life on Earth went extinct