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Plate Tectonics (Hot Spots (Is always hot (Magma comes from the lower…

- - - - Magma melts up through the mantle
- - - - Oceanic crust
        
        Made of metals
      - Continental crust
        
        Made of silica
    - - Oceanic-continental convergent
        
        Volcano makers
      - Continental-continental convergent
        
        Mountain makers
      - Oceanic-oceanic convergent
        
        Island arcs
  - - - Causes earthquakes
- - - - Drives plate tectonics #
      - Pulls plates
    - - Transfer heat
  - - - Radiation melts the mantle close to the core. #
        
        This mantle becomes less dense
        
        The heavier, more dense, mantle sinks towards the core
        
        Sinks because of gravity
        
        The heavier mantle pushes the less dense mantle towards the crust
- - - - Went on expeditions to Greenland for research
    - - Ancient climates
      - Geologic units match
      - Fossils match
      - Continents fit like a puzzle
      - Age of the ocean floor
      - Sediment