Why is australia so flat and dry

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  • Russia, Canada, China, USA, Brazil, AustraliaSee p 9 Aust Explorations (text) for size comparison to US, EuropePopulation density Aust = 2.9 p/km2 3rd lowest (Mongolia, Namibia) http://www.worldatlas.com/aatlas/populations/ctypopls.htm
  • Pause for student responses? (Hay plain)
  • Can explain processes of weathering and erosion…
  • Animation on mountain building
  • Australia in middle of plate
  • Explain + students to draw diagram
  • Draw simple diagram + students to copy
  • Confluence Project?Share some stories about your own personal interaction with Australia’s physical environment?
  • Why is australia so flat and dry

    1. 1. Year 10 GeographyInvestigating Australia’s Physical Environments
    2. 2. Population of 22.8 million Australia 6th largest country on Earth by area.Approximately 7682 millionsquare kilometres.
    3. 3. Australia is the Flattest and Driest inhabited Continent on Earth
    4. 4. Why so Flat?
    5. 5. Australia has remained geologicallyunchanged for a very long time (around 3billion years)Long exposure to weathering and erosion. Topography flattened
    6. 6. Tectonic/Volcanic FactorsAustralia is located in the middle of the Australian Plate Tectonic movements or uplift has not created significant mountains. http://www.youtube.com/watch?v=Tzt_EBD3DDQ
    7. 7. Why so dry?
    8. 8. Australia’s size and shape contribute considerably to its dryness.
    9. 9. TopographyNo significant landforms/mountains results in limited Orographic rainfall.
    10. 10. ContinentalityGenerally, rainfall decreases as you move away from large bodies of water (i.e Oceans) Rain bearing winds from the coast can’t make it to the interior.
    11. 11. Prevailing Winds and Ocean Currents Prevailing winds come from the South West.These pass over cold ocean currents, which do not allow for evaporation. Low precipitation
    12. 12. What does all this mean?The physical geography has a monumentaleffect on the natural and humanenvironment. Provide some examples?- The environments that exist- Flora and fauna- Inhabitability, distribution of people, location of cities- Land use and agriculture
    13. 13. It is all interconnected!

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