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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
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!)
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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