Quiz review
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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

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

Question 1

  • What are mass movements?


Question 2

Question 2

  • Name 2 types of mass movements.


Question 3

Question 3

  • What is one major cause of a landslide?


Answers

Answers

  • Large area of earth moved by gravity down a slope.

  • Slump, Slide, Fall or Flow

  • Increase in water or slope


Mass extinctions

Mass Extinctions


Geologic time scale

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!)


Geologic timeline

Geologic timeline


Mass extinctions1

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.


Causes of mass extinctions

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?


5 major mass extinctions

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)


Historic mass extinctions

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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