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Volcanic Activity - Coggle Diagram

- - - - Predicts when and where they might erupt
- - - - Cools and hardens at the surface - lava
        
        Layers of lava ash build up around the vent
- - - - Extinct: Is never expected to erupt again
- - - - Overtime, some of these rose above the sea to form volcanic islands. Iceland is a volcanic island.
- - - - 90% of worlds earthquakes occur here