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Plate Tectonics - Coggle Diagram

- - - - More pressure builds up as the plates are less dense - no subduction of continental plates
    - - heavier plate subducts and this causes fold mountains
      - Volcanoes will occur due to the built up pressure at the oceanic plate and these erupt and form island arcs
    - - Fold mountains occur when sediment is pushed upwards during subduction
      - The oceanic plate is melted as it moves into the asthenosphere and the extra magma created causes pressure to build up
      - Denser oceanic plate subducts and the plate subducting leaves a deep trench
      - The pressurised magma forces through weak spots in the continental plate ans this can create Composite volcanoes that are explosive
  - - - Magma rises in the gap left by the plates separating, it cools and forms new land
      - Less explosive volcanoes form as magma rises
      - New land forming as the sea floor spreads is called sea floor spreading
        
        This is theorised by harry hess
    - - Volcanoes may form where the magma rises
      - eventually the gap will fill with water and completely seperate from the mainland
      - As the continental plates spread they create rift valleys
      - the lifted areas are known as horsts and the valleys are known as graben
- - - - Island arcs
      - Ocean trenches
      - Earthquakes
      - Volcanoes
    - - Earthquakes
      - Volcanoes
      - Fold mountains
    - - Fold mountains
      - Earthquakes
  - - - volcanoes
      - Earthquakes
      - Rift valleys
    - - Ocean ridges
      - Volcanoes
      - Earthquakes
- - - - Solid ball of Iron/Nickel, very hot due to radioactive decay and pressure, the heat is responsible for Earth's internal energy
    - - Semi molten, Iron/Nickel
    - - Mainly solid rocks and the rocks are high in silicone - the very top layer is the asthenosphere
    - - The very top of lithosphere, oceanic plate is dense and is destroyed by plate movement, continental plate is less dense and is not destroyed