1. Keep up & fill in the answers
Test Review
Plate Tectonics

2. Continental Drift
States that continents have moved slowly to their current locations

3. Watch plate boundaries
I worked hard
On these graphics

4. Pangaea
All continent once connected together

5. Wegner’s Evidence for continental drift
Fossils
Rocks
Climate clues

6. Seafloor Spreading
Harry Hess provided the theory that plates were spreading apart in the middle of the ocean
How did this help Wegner’s theory?

7. Magnetic Reversal
Rocks discovered at the bottom of the ocean contained iron bearing minerals
Reversals were recorded in the solidified rocks

8. Lithosphere
Contains the crust & the upper mantle

9. Asthenosphere
A plastic like layer that the plates float around on

10. Convergent boundaries
Plates move together

11. Divergent Boundary
Plates move apart

12. Transform Boundaries
Plates slide past each other

13. Convection Currents
The heating, rising, cooling, and sinking of material inside of earth
It IS the driving force behind plate tectonics

14. Earthquakes Mostly occur along transform boundaries
Does that mean they can’t happen any where else????
San Andreas California contains the most commonly know transform fault for us

15. Mountain Building Did you see towel experiment in the video?
This happens when 2 continental plates collide

16. Looking Ahead
Earthquakes & tsunamis
tsunamis

17. Why study rocks
Clues?
Predictions?
Evidence?
Rock Cycle