1. The Theory of Plate Tectonics By: Geo T.

2. Plate Tectonics The outermost part of the Earth is made of two layers The outermost part of the Earth is made of two layers Lithosphere – the crust and mantleLithosphere – the crust and mantle Asthenosphere – the viscous part of the mantleAsthenosphere – the viscous part of the mantle

3. Plate Tectonics Cont. The Lithosphere floats on the Asthenosphere. The Lithosphere floats on the Asthenosphere. The Lithosphere is broken up into tectonic plates. The Lithosphere is broken up into tectonic plates.

4. The Plates * Hover over for names

5. Movement The plates move in relation to each other and form three different types of plate boundaries: The plates move in relation to each other and form three different types of plate boundaries: ConvergentConvergent DivergentDivergent TransformTransform

6. Convergent Occurs when plates collide. There are three types. Occurs when plates collide. There are three types.

7. Divergent Occur when to plates are moving apart and new crust is created by magma pushing up from the Earth’s mantle Occur when to plates are moving apart and new crust is created by magma pushing up from the Earth’s mantle

8. Transform Occurs where plates grind past each other Occurs where plates grind past each other