1. Spheres of the earth 1.What is the Atmosphere? Layer of gases that surround the earth 1.What is the Biosphere? The part of the earth where life exists 2.What is the Hydrosphere? The areas of water on the earth 3.What is the Lithosphere? Surface Land area of the earth’s crust

2. Plate Tectonics

3. Pangaea - Supercontinent

4. Plate Tectonics Describes the movement of the earth’s lithosphere.

5. Layers of the earth

6. Convection The movement of hot and cool mantle moving in the earth causing plates to move.

7. Convection and plates

8. Strike – Slip/Faulting Grinding or sliding past each other creating cracks in the earth’s crust.  San Andreas Fault

9. San Andreas Fault

10. Divergent boundaries Where plates are coming apart.  Mid – Atlantic Ridge and Great Rift Valley

11. Mid – Atlantic Ridge

12. Convergent boundaries Plates crashing into each other. There can be several forms: Rocky Mountains and Himalayas Continental and Continental Ocean and Ocean Ocean and Continental

13. Subduction When a sea plate collides with a continental plate. The sea plate goes under the continental plate.

14. Ring of Fire Marks the boundary where two plates meet causing many earthquakes and volcanoes.

15. Ring of Fire