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Earth structure for S2
 

Earth structure for S2

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    Earth structure for S2 Earth structure for S2 Presentation Transcript

    • Unit 1AAnatomy of the Earth
    • 1 in 5
    • Core
    • 1000 miles an hour
    • Core
      • Inner Core:
      • Solid
      • Up to 4700 C
      • Iron, Nickel
      • Dense
      • Outer Core
      • Molten iron
      • 3500-4000C
      • Dense
    • Mantle
      Silicates and Magnesium Oxide
      Dense
      1000-3500 C (hotter towards the core)
      Mostly solid, but rocks flow under pressure-viscous
      Giant convection currents carry heat from the core to the crust, ...
      ..and return cooler material towards core
      Thin layer of near-molten rock near crust
      Moho is the boundary between crust and mantle
    • Oceanic or Continental Crust?
      Of the two,
      Which is thicker?
      Which is more dense?
      Which is older?
      Which has greater complexity of rock types?
      Which gets recycled?
    • The Crust
      “ A brittle, fractured,
      thin, solid layer”
    • Crust