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PLATE TECTONICS – Main Parts The Theory of Plate Tectonics ‘slab of rock’ 1. The Lithosphere (outer portion of earth, includes crust and upper mantle) is broken into pieces called *PLATES* L A 2. *CONVECTION CURRENTS* in the Asthenosphere (soft part of mantle, below lithosphere) move the Plates. T ASTHENOSPHERE ‘to build’ LITHOSPHERE E S P ASTHENOSPHERE MANTLE 3. The moving Plates create different *PLATE BOUNDARIES* (mark where two different plates meet) 4. Different Plate Boundaries create different *LANDFORMS and EVENTS* Such as: Earthquakes, Volcanoes, Rift Valleys, Subduction, Deep-Ocean Trenches, Mountains, Mid-Ocean Ridge, Sea Floor Spreading, Stresses/Faults, etc. PLATE TECTONICS – Main Parts PLATE BOUNDARY CONVERGENT BOUNDARY DESCRIBE WHAT IS HAPPENING When Two plates move towards each other (collide). *Crust is being DESTROYED* DIVERGENT BOUNDARY When two plates move away from each other (they diverge). *Crust is being CREATED* TRANSFORM BOUNDARY When two plates grind past each other. *Crust is NEITHER Created or Destroyed* ILLUSTRATE WHAT IS HAPPENING