Geology 100 Self-test 4

Answer the questions below and then click "submit" to send your answers.

  1. What is the evidence that South America and Africa were once joined?

    2. Your answer:

  2. What is Pangea?

    3. Your answer:

  3. How does sea-floor spreading account for the age of the sea floor?

    4. Your answer:

  4. Define lithosphere and athenosphere.

    5. Your answer:

  5. What is the origin of the marine magnetic anomalies according to Vine and Matthews?

    6. Your answer:

  6. Why does the pattern of magnetic anomalies at sea match the pattern of magnetic reversals (recorded in lava flows on land)?

    7. Your answer:

  7. What is a transform fault?

    8. Your answer:

  8. What is a mantle plume? What is the geological significance of mantle plumes?

    9. Your answer:

  9. The southern supercontinent is called

    10. Your answer:
    Gondwanaland
    Laurasia
    Pangea
    Glossopteris

  10. The sliding of the sea floor beneath a continent or island arc is called

    11. Your answer:
    rotation
    subduction
    tension
    wandering