1. Objective 10/10/12
Describe the three types of tectonic plate boundaries.
Intro
What do you think forms when two tectonic plates collide? What about when they divide?

2. Plate Boundaries

3. Plate Boundaries 3 Types of Boundaries Divergent boundary
Plates separate
2 types
Transform boundary
Plates slide past each other
1 type
Convergent boundary
Plates collide
3 types

5. Plate Boundaries Continental-Continental divergence Rift valley
Small volcanoes and earthquakes
Example: African Rift Valley
Deep valley that forms when 2 continental crusts move apart

6. DRAW

7. Divergent Boundary

11. Oceanic-Oceanic divergence
Mid-ocean ridge
Small volcanoes and earthquakes
Example: Mid-Atlantic Ridge
Underwater mountain chain’s and valley’s created by sea-floor spreading

12. DRAW

14. Plate Boundaries Transform Boundary Plates slide past each other
Many earthquakes occur here
Example: San Andreas Fault in CA

15. DRAW

19. Convergent Boundary Oceanic-Oceanic collision Subduction
Deep-ocean trench
Creates huge volcanoes and earthquakes
Example: Philippine islands
Process of denser crust sinking down into mantle
Valley/canyon created at subduction zone

20. DRAW

21. Oceanic – Oceanic Collisions

25. Continental-Oceanic Collision
Subduction of ocean plate
Powerful volcanoes and earthquakes
Forms mountains
Example: Andes mountains in Chile

26. DRAW

27. Continental – Oceanic Collisions

31. Continental-Continental collision
Creates HUGE mountains
Both crusts move upward since neither are dense enough to sink into mantle
Example: Himalayan Mtns. in India

32. DRAW

33. Continental – Continental collisions

39. (Tectonic Plates Video - F4)

40. Plate Boundaries
Summary: Plates can collide into each other, separate and slide past each other creating the three types of plate boundaries: Divergent, Convergent and Transform. These boundaries create many different types of landforms on Earth.

41. What do you think makes these plates move into each other?
Objective 10/10/2012
Describe the three types of tectonic plate boundaries.
Outro
What do you think makes these plates move into each other?