Download Unit Three Review Guide: Plate Tectonics

Unit Three Review Guide: Plate Tectonics
You may use this review guide on the test. Put the answers on a separate sheet
of paper.
Vocabulary
Pangaea:
Continental Drift:
Mid-ocean Ridge:
Seafloor Spreading:
Normal Polarity:
Magnetic Reversal:
Reversed Polarity:
Plate Tectonics:
Lithosphere:
Divergent Plate Boundary:
Convergent Plate Boundary:
Subduction:
Convection:
Long Answer
Each response should have at least 2-3 sentences MINIMUM. The more detailed your answer,
the better you will do on the test.
Lesson 1 Review
1. What was Pangaea? Where is it now?
2. Describe Wegner’s theory of continental drift.
3. Explain how each of the following items helps explain and support Wegner’s theory of
continental drift:
a. Shape of continents:
b. Fossil evidence:
c. Glacial markings:
4. Why was Wegners theory not supported right away?
Lesson 2 Review
1. What is a mid-ocean ridge and what is produced here?
2. How does the age of oceanic crust change the further it gets from the mid-ocean ridge?
3. Explain the relationship between normal polarity, reversed polarity, magnetic reversal, and the
evidence for seafloor spreading.
4. What theory does ‘sea-floor spreading’ support? (hint: what is being moved as a result of seafloor spreading?)
Lesson 3 Review
1. Explain the theory of plate tectonics.
2. Describe the processes that happen at:
a. Divergent Plate Boundaries
b. Transform Plate Boundaries
c. Convergent Plate Boundaries
3. Where is new oceanic crust formed?
4. Where is older oceanic crust destroyed?
5. Which type of boundary does subduction happen at?
6. What type of natural disasters occur at transform plate boundaries?
7. What two landmarks form at subduction zones?
8. Describe the relationship between convection currents in the mantle and plate tectonics.
9. Why does the theory of plate tectonics continue to change?