Chapter 8 Plate Tectonics

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

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

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

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

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

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. 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