1. Tectonic Plate Boundaries
Chapter 7
Section 3 The Theory of Plate Tectonics
Tectonic Plate Boundaries
There are three types of tectonic plate boundaries:
Transform Boundaries
Convergent Boundaries
Divergent Boundaries

2. Tectonic Plate Boundaries,
Chapter 7
Section 3 The Theory of Plate Tectonics
Tectonic Plate Boundaries,
When two tectonic plates slide past each other horizontally, the boundary between is called a transform boundary.

3. Tectonic Plate Boundaries, continued
Chapter 7
Section 3 The Theory of Plate Tectonics
Tectonic Plate Boundaries, continued
When two tectonic plates collide, the boundary between them is a convergent boundary.

4. Tectonic Plate Boundaries, continued
Chapter 7
Section 3 The Theory of Plate Tectonics
Tectonic Plate Boundaries, continued
When two tectonic plates separate, the boundary between them is called a divergent boundary.

5. Your turn! Tectonic Plate Boundaries, continued Chapter 7
Section 3 The Theory of Plate Tectonics
Tectonic Plate Boundaries, continued
Your turn!
Students create human models of plate boundaries, either using their hands or partners.

6. Example: San Andreas Fault
Chapter 7
Section 3 The Theory of Plate Tectonics
Transform Boundaries
Example: San Andreas Fault
Earthquakes!

8. Example: Mid-Atlantic Ridge
Chapter 7
Section 3 The Theory of Plate Tectonics
Divergent Boundaries
- new sea-floor forms
Example: Mid-Atlantic Ridge

9. There are three types of convergent boundaries.
Chapter 7
Section 3 The Theory of Plate Tectonics
Convergent Boundaries
There are three types of convergent boundaries.
Reminder: oceanic crust is denser than continental crust.

10. One plate goes under the other
Chapter 7
Section 3 The Theory of Plate Tectonics
1. Oceanic + Oceanic = Subduction
One plate goes under the other
Features: volcanic islands, underwater volcanoes
Ex: Mt. Fuji, Ring of Fire

14. Oceanic crust is pushed down Features: volcanic mountains
Chapter 7
Section 3 The Theory of Plate Tectonics
2. Oceanic + Continental = Subduction
Oceanic crust is pushed down
Features: volcanic mountains
Ex: Mount St. Helens

17. Both plates buckle, and push the crust upward
Chapter 7
Section 3 The Theory of Plate Tectonics
3. Continental + Continental = Build-up
Both plates buckle, and push the crust upward
Features: mountain ranges
Ex: Himalayas

21. Chapter 7
Section 3 The Theory of Plate Tectonics

22. Chapter 7
Section 3 The Theory of Plate Tectonics