1. Chapter 8 Plate Tectonics
Earth has plates???
The formation, movement and interactions of earth’s plates
Rigid moving pieces of Earth’s crust, called……….

2. Lithosphere
Asthenosphere
Rigid, moving pieces of Earth’s crust and upper mantle
Partially melted layer on top of which the lithosphere moves

4. Continental drift
Theory proposed by Alfred Wegener stating that the continents moved or drifted from one location to another over a period of time

5. Common fossils on South America and Africa
MESOSAURUS
Evidence????

6. Location of Earthquakes and Volcanoes….
Located along plate boundaries
Ring of Fire….ring of volcanoes & earthquakes around the Pacific Ocean

7. Types of Plate Boundaries
4 types of plates boundaries…
Divergent
Convergent/collision
Subduction
Transform/sliding

8. 2 plates are moving apart
Mid-ocean ridge
Divergent
Feature formed?

9. Example – Mid-Atlantic Ridge

11. Convergent/collision
Feature formed?
2 plates slam together
Mountains and mountain ranges

12. Example - Himalayas

13. Subduction
Feature formed
One plate moves underneath another plate
Trench

14. Example – Marianas Trench & Peru-Chile Trench

15. The denser one (ocean) It melts! Ocean- ocean plate
Ocean – continental plate
Which plate subducts?
What happens to it?
The denser one (ocean)
It melts!

16. Transform/sliding
Feature formed?
2 plates slide past each other
Fault, like San Andreas

17. Example – San Andreas