1. Plate Tectonics
Shake, Rattle, & Roll!

2. Plate Tectonics
a scientific theory that describes the large scale motions of the Earth's plates which make up the lithosphere. These plates rest on the asthenosphere.

3. Layers of the Earth

4. Plate Movement
It is believed that tectonic plates are moved by several different forces:
Rotation of the earth
Tidal forces of sun & moon
Gravitational pull
Convection cell

5. Alfred Lothar Wegener
Developed the theory of Pangea & Continental Drift.

6. Pangea

7. The Case for Pangea

8. Continental Drift
Direction of plate drift

9. Types of Plate Motion Convergent Divergent Transform
Tectonic Plate Motion
Under the Earth & Beyond – Plate Tectonic Motion

10. Convergent Boundaries- Where two tectonic plates come together
There are 3 types of convergent boundaries, all 3 cause earthquakes.
Oceanic>Continental
Volcanoes
Oceanic trenches
Oceanic>Oceanic
Tsunamis
Island arcs
Continental>Continental
Mountain building

11. Oceanic Continental

12. Andes Mountains- The main cause of the rise of the Andes is the compression of western rim of the South American Plate due to the subduction of the Nazca Plate and the Antarctic Plate.

13. Oceanic Oceanic

14. Philippine Islands- Oceanic to oceanic convergence- located near the edge of the Pacific Ring of Fire

15. Continental Continental

16. Himalayan Mountains- Formed by the collision of the Eurasian Plate and the Indian Plate.

17. Divergent Boundaries- where two tectonic plates pull apart
There are 2 types of divergent boundaries.
Sea Floor Spreading
Oceanic Ridges
Continental Rift
Rift Vallies

18. Sea Floor Spreading

19. Age of the Ocean Floor- Red is the newest – Blue is the oldest

20. Continental Rift

21. Rifting earth of Ethiopia
three plates are pulling away from one another: the Arabian Plate, and the two parts of the African Plate(the Nubian and the Somalian)

22. Transform Boundaries- where two tectonic plates grind past each other.
A transform boundary is just that, a transform boundary.
Transform boundaries can have jagged edges that get caught on each other, when this happens massive pressure builds up which releases in an:
Earthquake.

23. Transform Boundary

24. Transform Boundary Arial photo of the San Andreas Fault
Border of the Pacific & North American plate, 810 miles long.
Arial photo of the
San Andreas Fault