1. Inside Earth Chapter 1.5 Pages 42-47
Plate
Tectonics
Review Sea-floor Spreading and the convection process – have students explain
Mid-ocean ridge and Deep-sea trenches (what is Subduction?)
What is a plate? Dinner Plate, Home Plate, metal plates… etc.
Inside Earth Chapter 1.5
Pages 42-47

2. Cracks in the Earth

3. Plate Tectonics
Scientist J. Tuzo Wilson in 1965 combined Continental Drift & Sea-Floor Spreading, creating…
Theory of Plate Tectonics: plates (pieces of Earth’s lithosphere) are in constant, slow motion, driven by convection currents in the mantle.

4. Earth’s Plates

5. Climate Recall the Crust
There are 3 types of boundaries in Plate Tectonic Theory
Convergent
Divergent
Transform
Each boundary creates a geologic feature depending on the type of crust involved
Continental
Oceanic

6. Convergent Boundaries
Climate
Definition: two plates move towards each other. (Collision Boundary)
What geologic features do Continental crust collisions create?

7. Convergent Boundaries
Geologic Features:
Cont/Cont collision forms mountains (Himalayas)

8. Convergent Boundaries
Geologic Features:
Cont/Ocean (Subduction boundary)
Denser Ocean plate subducts
Trenches, Volcanoes
Example:
Mt. St. Helens

10. Convergent Boundaries
Geologic Features:
Ocean/Ocean (Subduction boundary)
Denser Ocean plate subducts
Trenches, Volcanic Island Arc
Example:
Hawaii

11. Climate Divergent Boundaries Definition: two plates moving apart
Geologic Features: forms a rift valley
Examples:
Great Rift Valley
Mid-Ocean Ridge

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

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

14. Climate Boundary Diagrams Cont. Crust Boundary: Motion: Crust:
Features formed:
Boundary: Convergent
Motion: Towards each other
Crust: Continental & Continental
Features formed: Mountain ranges
Cont. Crust

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

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

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

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