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Plate Tectonics

Explore the dynamics of tectonic plates, the differences between brittle and ductile plates, continental versus oceanic plates, plate movement observations, divergent and convergent plate boundaries, transform plate boundaries, and the formation of land and landforms. Discover the significance of Earth's tectonic plates and how they shape our planet.

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Plate Tectonics

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  1. Plate Tectonics “Building Up and Tearing Down”

  2. Tectonic Plates

  3. Brittle vs. Ductile • Brittle: Breaks relatively easily. • Ex: A wooden pencil • Ex: Peanut Brittle (Yum) • Ductile: Relatively flexible. • Ex: A denim pencil • Ex: Silly Putty

  4. Continental vs. Oceanic Plates • Less Dense • Thicker (35-70 km) • Brittle (Not Stretchy) • Much Older (3.7 billion years old) • More Dense • Thinner (5-10 km) • Ductile (A Bit Stretchy) • Much Younger (144 million years old)

  5. Plate Movement Observations Wrinkled Edges Both Go Up Black Goes Down

  6. Divergent Plate Boundaries Divergent Plate Boundaries are where the plates are moving (Drifting) apart.

  7. Mid-Ocean Ridge

  8. Mid-Ocean Ridge

  9. Iceland Rift Valley

  10. Great Rift Valley

  11. Convergent Plate Boundaries Convergent Plate Boundaries are where the plates are colliding (coming together).

  12. Subduction Zone

  13. Crater Lake (Near Bend, OR)

  14. Folded Mountains Himalayan Mountains

  15. Island Arcs Aleutian Islands (AK)

  16. Transform (Fault) Plate Boundaries Transform (Fault) Plate Boundaries are where the plates are sliding past each other. (Like two trains going past each other, I know it’s a stretch).

  17. San Andreas Fault

  18. Earth’s Tectonic Plates

  19. Plate Movement

  20. Plate Movement

  21. Plate Movement (ScienceSaurus 185)

  22. Plate Movement Model Lab Big Idea (Inquiry 15.1) Plate tectonics lead to formation of land and landforms as well as the destruction of crust. It is important to know which landforms are created at which types of plate boundaries. There are some interactive websites that are helpful with this topic.

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