1. Plate Tectonics

2. Warm-Up
What evidence do we have that supports the idea of one giant supercontinent (Pangaea)? Cite evidence from Alfred Wegner’s findings.
What force is causing the Earth’s plates to move?

3. How is this possible?!?!?

5. Objective By the end of class you will….
Be able to identify the three different types of plate boundaries.

6. 3 Types of Plate Boundaries
Convergent
Divergent
Transform

7. Convergent Boundary: plates are moving toward each other and are colliding (3 types)

8. When a continental plate collides with another continental plate
Mountain ranges are created
(example: Himalayan Mountains)

9. The Himalayas
Himalayas and Mt. Everest continue to grow about 1-4 inches per year!

10. When Oceanic Plates collide with Continental Plates
Create subduction zones or trenches
Create near coast volcanoes
Example Ring of Fire!

12. When ocean plates collide with other ocean plates
Island arcs are created
(a pattern of volcanic islands created from a subduction zone that is located off the coast)

13. Aleutian Islands

14. Plate Boundaries
Divergent boundary:
Plates are moving away from each other

15. Plate Boundaries
Divergent boundary:

16. Transform Fault Boundary
Plates are neither moving toward nor away from each other, they are moving past one another.

17. Transform Fault Boundary
The plates may move in opposite directions or in the same directions but at different rates and frequent earthquakes are created! (example: San Andreas Fault)

18. San Andreas Fault

19. Let’s Play Name That Boundary!

22. North American Plate
Pacific Plate

27. How can Oreos model the plate boundaries?
Very carefully, take just the top cookie off the Oreo.
Break the top cookie into 2 equal halves.
Replace the cookie halves back on the Oreo
Using the cookie,
Demonstrate a transform fault boundary
Demonstrate a divergent plate boundary
Demonstrate a convergent plate boundary

28. Quiz Time!