1. The Theory of Plate Tectonics

2. Plate Tectonics Power Point Unit B: The Dynamic Earth   Learning Target: 4b) Compare and contrast (movement, location, landforms, specific examples) the three major types of plate boundaries. (DOK2)

3. Essential Question What are the different types of plate boundaries and how do they impact us and the Earth?

4. Vocabulary  Plate:  A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.  Plate Tectonics:  The theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle.

5. Vocabulary  Plate Boundary  Where two plates meet  Fault:  A break in Earth’s crust where slabs of rock slip past each other.  Rift Valley:  A deep valley that forms where two plates move apart.

7. TYPE OF BOUNDARYSKETCH DIRECTION OF MOVEMENT (show arrows) ASSOCIATED LANDFORMS REAL-WORLD EXAMPLES Divergent Transform-Fault Convergent (Collision) Continent -Continent Convergent (Subduction) Ocean-Continent Convergent (Subduction) Ocean- Ocean

8. Plate Boundaries  The lithosphere is broken into separate sections called __________.  True or False: Plates can carry continents or parts of the ocean floor but not both.  False plates

9. Divergent Boundaries

10. Convergent Boundaries Ocean-Ocean Convergence Ocean-Continent Convergence Continent-Continent Convergence

11. Transform Boundary

12. A Theory of Plate Motion  Pieces of Earth’s lithosphere are in constant, slow motion, driven by convection currents in the mantle.  True or False: The theory of plate tectonics explains the formation, movement, and subduction of Earth’s plates.  True

14. Plate Boundaries  True or False: Crust is both created and destroyed along a transform boundary.  False  Most divergent boundaries occur at the ________________.  The density of the plate determines which plate comes out on top. mid-ocean ridge

15. The Continent’s Slow Dance  Plates move from about one to ten centimeters per year.  True or False: The pieces of the super continent Pangaea began to drift apart about 225 million years ago.  True

16. Check for Understanding Describe the theory of plate tectonics and the major types of plate boundaries.