1. PLATE TECTONICS Prentice Hall

2. Earth’s Interior  Crust  Ocean & Continent  Mantle  Lithosphere  Asthenosphere  Mesosphere  Core  Outer  Inner

3. Lithosphere  Composed of:  Uppermost mantle  Crust  Broken into rigid plates  Plate motion  Collide  Move apart  Slide past one another one another

4. LITHOSPHERIC PLATES

5. PLATE BOUNDARIES  Diverging (move apart)– two plates spread apart; magma rises between plates; volcanoes form  Converging (collide)  Ocean/Continent - subduction of ocean plate beneath continent; volcanoes form  Ocean/Ocean – subduction of one ocean plate beneath another; volcanoes form  Continent/Continent – collision causes mountains to rise up; earthquakes occur  Transform (slide past) – two plates slide past each other; transform faults

6. DIVERGING BOUNDARY

7. Divergent – Seafloor Spreading

8. CONVERGING – SUBDUCTION Continent / Ocean

9. CONVERGING – SUBDUCTION Ocean / Ocean

10. CONVERGING CONTINENTAL COLLISION Continent / Continent

11. Transform Boundary - slide

12. TRANSFORM BOUNDARY

13. Transform Fault Boundary

14. EVIDENCE: Hot Spot  Plume of magma rises from deep in mantle  Hawaii sits on top of a Hot Spot

15. Hot Spot  Magma ‘burns’ a hole in the plate as it moves over the hot spot  Hawaiian Islands get progressively older to the north

16. Plate Motion Convection Currents

17. Convection in the Mantle Hot currents rise & cold currents sink