1. Plate CH 4 Prentice Hall p.132-137 CH 4 Prentice Hall p.132-137 Tectonics

2. Wilson combined Continental Drift & Sea- Floor Spreading, creating… Plate Tectonics: theory stating that plates (pieces of Earth’s lithosphere) are in constant, slow motion, driven by convection currents in the mantle. Plate Tectonics CD Rift Evidence

3. Earth’s Plates CD Rift Evidence

4. Climate Convergent Boundaries Definition: two plates move towards each other. (Collision Boundary) Does Cont/Cont collision create land?

5. Geologic Features – Cont/Cont collision forms mountains (Himalayas) Convergent Boundaries

6. Geologic Features: – Cont/Ocean (Subduction boundary) Denser Ocean plate subducts Trenches, Volcanoes (Mt. St. Helens) – Ocean/Ocean (Subduction boundary) Denser Ocean plate subducts Trenches, Volcanic Island Arc Convergent Boundaries

8. Definition: two plates moving apart Geologic Features: forms a rift valley Other Info – Great Rift Valley – Mid-Ocean Ridge Climate Divergent Boundaries

9. Two plates slide past each other in opposite directions Geologic Features – Faults: break in crust Other Info – San Andreas Fault – Causes earthquakes Climate Transform Boundaries Pacific Plate North American Plate

10. Climate Boundary Diagrams Boundary: Transform Motion: Slide past each other Features formed: Fault Examples: San Andreas Fault

11. Climate Boundary Diagrams Boundary: Convergent Motion: Towards each other Crust: Continental & Features formed: mountain ranges

12. Boundary: Divergent Motion: Pull apart, move away Features formed: Mid- Ocean Ridge Boundary Diagrams

13. Climate Boundary Diagrams Boundary: Convergent Motion: Towards each other Crust: Oceanic & Oceanic Features formed: Subduction, Trench, Volcanic island arc

14. Climate Boundary Diagrams Boundary: Divergent Motion: Pull apart, move away Features formed: Rift Valley Example: Great Rift Valley

15. Climate Boundary Diagrams Boundary: Convergent Motion: Towards each other Crust: Oceanic & Continental Features formed: Subduction, Trench, Volcanoes