1. Tectonic Plates

2. Directions:
Use this PowerPoint to guide you through making your illustrations and information for your notes page.
When you finish your notes page, write and answer the review questions at the end of the PowerPoint in your CNB.

3. Plate Tectonics Greek – “tektonikos” of a builder
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

4. Continental Drift Alfred Wegener 1900’s
Continents were once a single land mass that drifted apart.
Fossils of the same plants and animals are found on different continents
Called this supercontinent Pangea, Greek for “all Earth”
245 Million years ago
Split again – Laurasia & Gondwana 180 million years ago

5. Evidence of Pangea

6. Sea Floor Spreading

7. 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

8. How Plates Move

9. Different Types of Boundaries

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

11. Divergent Boundary – Iceland

12. Divergent Boundary - Oceanic
Click here to discover the type of land formation created

13. Divergent Boundary - Continental
Click here to discover the type of land formation created

14. Convergent Boundary – Indian and Eurasian Plates
Indian Plate

15. Convergent Boundary – Oceanic & Continental
Click here for land formations
&

16. Convergent Boundary – Oceanic & Oceanic
Note – plates are reversed
Click here for land formations
&

17. Convergent Boundaries - Continental
Click here for land formations
&

18. Transform Boundary – San Andreas Fault
Click here for results of transform boundaries

19. Review Complete this review when you finish your notes and illustrations page.
Name the 3 main layers of the Earth.
Which layer makes up most of the Earth’s mass/size?
What is a tectonic plate?
What was Pangea?
What is Sea-Floor spreading?
Name the three different main types of plate boundaries and one location on Earth for each one.