1. Intro Objective 10/5/11 Describe the three types of tectonic plate boundaries. What do you think forms when two tectonic plates collide? What about when they divide?

2. Plate Boundaries

3. 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

4. BEGIN FOLDABLE

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. Outro Objective 10/3/11 Explain that the earth's lithosphere is composed of many plates rather than one continuous piece What do you think makes these plates move into each other?