Earthguide Online Classroom

Tectonic plates

Questions for thought

  1. Are plates capped with continental or oceanic crust? Consider the North American Plate.
  2. Are tectonic plates pieces of crust or lithosphere? What is the best answer?
  3. Which of these layers (by composition) make up a plate - crust, mantle core?
  4. As the Atlantic Ocean opens, what happens to the size of the North American Plate? Consult this animation.

Related resources

Last edited: April 3, 2008 - M. Yasuda.

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