地质学 TPO31-L2 Plate Drift

地质学

TPO31-L2 Plate Drift

Listen to part of a lecture in a geology class.

 



  1. What is the lecture mainly about?
  • A. How to predict the rate of tectonic plate movement.
  • B. A geologist’s attempt to determine the position of continents in the past.
  • C. Some ideas about future movements of Earth’s tectonic plates.
  • D. The history of a debate between two plates tectonic theories.

 

  1. The professor states that some continents are currently moving northward and some are moving westward.Indicate the direction in which the continents are currently moving.
  Northward Westward
Africa A B
Americas A B
Australia A B
  1. What process is currently taking place in the Atlantic Ocean?
  • A. One half of the ocean plate is sinking beneath the other half.
  • B. New rock is forming between two sections of the ocean floor.
  • C. A subduction zone is forming at the eastern edge of the ocean floor.
  • D. The ocean plate is moving away from the continental plates that are under the Americas.

 

  1. What long-term geoprediction do many geologists make?
  • A. Continents will become smaller than they are now.
  • B. Subduction will cause one continent to sink under an ocean.
  • C. North and South America will move away from each other.
  • D. The current continents will eventually join together.

 

  1. Based on the discussion, what happens when a continental plate and an oceanic plate collide?
  • A. The edge of the oceanic plate moves down into the mantle.
  • B. Slab pull causes the ocean floor to expand.
  • C. New rock material rises to the surface at the subduction zone.
  • D. Parts of each plate break off into the ocean.

 

  1. What is important difference between the two hypotheses discussed by the professor?
  • A. They make different predictions about the direction in which the American continents will move.
  • B. They make different predictions about how long it will take for Pangaea Ultima to form.
  • C. Only one predicts that Asia will eventually begin to move eastward.
  • D. Only one predicts that some tectonic plates will eventually stop moving.



答案:
C ABA B D A A


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