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Quiz/Review

Quiz/Review. Get out a small piece of paper and put your name on it. When the bell rings, the quiz will begin. Question 1. What are mass movements?. Question 2. Name 2 types of mass movements. Question 3. What is one major cause of a landslide?. Answers.

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Quiz/Review

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  1. Quiz/Review • Get out a small piece of paper and put your name on it. • When the bell rings, the quiz will begin.

  2. Question 1 • What are mass movements?

  3. Question 2 • Name 2 types of mass movements.

  4. Question 3 • What is one major cause of a landslide?

  5. Answers • Large area of earth moved by gravity down a slope. • Slump, Slide, Fall or Flow • Increase in water or slope

  6. Mass Extinctions

  7. Geologic Time Scale • Earth was formed 4.6 BYA (billion Years Ago) • How do we know this? • How old is the oldest rock on Earth? • (look at your ESRT!)

  8. Geologic timeline

  9. Mass Extinctions • These are events where most or a lot of living things on Earth were killed. • To go Extinct means to have a whole species die and nothing is left living from that species.

  10. Causes of mass extinctions • Meteor impacts • Global Warming • Oxygen levels • Sea level change • Storms • Volcanic eruptions • Possible many more things… can you think of something?

  11. 5 Major mass extinctions • Cretaceous (65mya) • 62% loss of species caused by impact and flood basalts • Triassic (210mya) • 65% loss of species caused by impact and flood basalt. • Permian (250mya) • 90% loss of species caused by impact, flood basalts, & global warming. • Devonian (365mya) • 72% loss of species caused by impact. • Ordovician (445mya) • 65% loss of species caused by ice age and sea level fall (still debated)

  12. Historic Mass Extinctions • One famous one is the K-T extinction. • Cretaceous and Tertiary periods • Where the dinosaurs died. • Now?? Humans? • Global Warming • Sea level rise • Changing CO2 level • Loss of resources

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