Tectonics - Structure of earth

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  • Tectonics
    • The structure of the earth
      • Outer core
        • Temperatures of around 55oo
      • Mantle
        • Convection currents in the mantle
      • Crust
        • Around 0-70 km thick
        • There are two types of crust
          • The less dense continental crust
        • Outer layer of the earth
      • Plates
    • The two different types of crust
      • Oceanic Crust
        • This is the newer crust - most is less than 200 years old
        • Denser than continental
        • Can sink/can be renewed/destroyed
      • Continental crust
        • cannot sink/cannot be renewed or destroyed
  • Inner Core - centre of the earth
    • The structure of the earth
      • Outer core
        • Temperatures of around 55oo
      • Mantle
        • Convection currents in the mantle
      • Crust
        • Around 0-70 km thick
        • There are two types of crust
          • The less dense continental crust
        • Outer layer of the earth
      • Plates
    • Solid iron and nickel - temp of around 6500
  • Engine room of the whole earth
    • Solid iron and nickel - temp of around 6500
  • Surrounds inner core - and is liquid iron and nickel
    • This is the largest section of the earths structure
      • Its made of a semi molten rock called magma
        • Cause plate movement (continental drift)
          • The denser oceanic crust
            • Older - most continental crust is older than 1500 years old
              • Continental crust
                • cannot sink/cannot be renewed or destroyed
              • It is less dense
            • The point at where two plates meet is called a plate boundary

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