Please enable JavaScript.

Coggle requires JavaScript to display documents.

Geography test revision - Coggle Diagram

- - - - Newer - less than 200 million years old
      - Denser
      - Can sink
      - Can be renewed and destroyed
    - - Older - over 1500 million years old
      - Less dense
      - Cannot sink
      - Cannot be renewed or destroyed
  - - - Two plates slide past each other due to the friction of the convection currents.
      - When the plates get caught or snagged the pressure builds up to cause an earthquake.
    - - Two plates move apart
      - Magma rises up and fills the cracks which causes volcanoes.
      - If the boundary is under the ocean, the lava cools and can construct a new land.
      - Example - Iceland
      - As the plates move apart, the friction may cause small earthquakes
    - - An oceanic plate collides with a continental plate
      - the denser or heavier oceanic plate will sink into the mantle and melt, this is called subduction.
      - When the plate melts it releases energy.
      - the melted crust becomes molten magma.
      - This may cause a volcanic eruption