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

  1. 1. 12. Plate Tectonics
  2. 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. 3. The Three Types of Plate Boundaries
  4. 4. Divergent -Rift Zone -Plates moving apart -Sea Floor created -Mid Ocean Ridges
  5. 5. Convergent -Subduction Zones -Plates moving toward each other -Seafloor destroyed -Creates trenches & Volcanic Island Arcs
  6. 6. Transform • Plates move past each other • Faults are formed
  7. 7. Example of Transform: San Andreas
  8. 8. Ring of Fire • Around Pacific Ocean • Greatest quantity of earthquakes/volcanoes • Ring (outer edge of) Pacific Plate is full of faults

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