Dynamic Earth

• Structure of the Earth :

  • Plate
  • Mantle
  • Outer Core
  • Inner Core
  • Crust
  • Plate Boundary
• Continental Drift - the processes in which Pangaea broke apart and moved creating continents.
• Convection Currents :

  1. The Earth's core heats magma in the mantle causing it to rise near the surface.
  2. As the magma rises it begins to cool.
  3. The cooling makes the magma heavier causing it to sink back down to the earths core.
  4. This cycle repeats over and over and causes the plates to move.
• Plate Boundaries :

  • Divergent/ Separating = Volcanic islands + Mid-ocean ridges
  • Convergent/Colliding = Volcanoes and Fold Mountains
  • Passive/Sliding = Earthquakes