1. Continental Drift
Liz LaRosa for use with my 5th Grade Science Class

2. Alfred Wegener
Proposed the the hypothesis of continental drift.

3. Continents used to be together.

4. Pangaea: the super continent
Greek word for “all Earth”

5. The earth split again

6. Pangaea

7. Pangaea
Evidence

8. Evidence of Pangea

9. Tectonic Plates

10. How Plates Move

11. Plate Tectonics Greek – “tektonikos” building
Pieces of the lithosphere that move around
Each plate has a name
Fit together like jigsaw puzzles
Float on top of mantle similar to ice cubes in a bowl of water

12. Review Name the 3 main layers of the Earth What is a tectonic plate?
Who the hypothesis of proposed continental drift?
What was Pangea?
Name 3 evidences for continental drift.

13. Stop here!!

14. Sea Floor Spreading

15. Sea Floor Spreading
Mid Ocean Ridges – underwater mountain chains that run through the Earth’s Basins
Magma rises to the surface and solidifies and new crust forms
Older Crust is pushed
farther away from the ridge

16. Different Types of Boundaries

17. Divergent Boundary – Arabian and African Plates
Arabian Plate
Red Sea
African Plate

18. Divergent Boundary – Iceland

19. Divergent Boundary - Oceanic

20. Divergent Boundary - Continental

21. Convergent Boundary – Indian and Eurasian Plates
Indian Plate

22. Convergent Boundary – Oceanic & Continental
&

23. Convergent Boundary – Oceanic & Oceanic
Note – plates are reversed
&

24. Convergent Boundaries - Continental
&

25. Transform Boundary – San Andreas Fault