12 plate tectonics notes
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  • 1. 12. Plate Tectonics
  • 2. Mechanism of Plate Tectonics • Material in asthenosphere heats and rises • When it cools it moves horizontally and sinks • This movement of material is called convection cells
  • 3. The Three Types of Plate Boundaries
  • 4. Divergent -Rift Zone -Plates moving apart -Sea Floor created -Mid Ocean Ridges
  • 5. Convergent -Subduction Zones -Plates moving toward each other -Seafloor destroyed -Creates trenches & Volcanic Island Arcs
  • 6. Transform • Plates move past each other • Faults are formed
  • 7. Example of Transform: San Andreas
  • 8. Ring of Fire • Around Pacific Ocean • Greatest quantity of earthquakes/volcanoes • Ring (outer edge of) Pacific Plate is full of faults