ZT Geology – Tectonic Plates

地质学
Tectonic Plates


1. What is the lecture mainly about?

  • A. The recent discovery of an unusual tectonic plate
  • B. The effects of underwater riffs on plate boundaries located on land
  • C. The development of a new technology for studying rifts located on land
  • D. The process by which tectonic plates are separated

2. Why does the professor mention Iceland?

  • A. To support the claim that rifts occur wherever volcanoes occur
  • B. To point out that Iceland is located on a plate boundary
  • C. To give an example of a rift area that is located on land
  • D. To give an example of an extraordinary active rift system

3. What unexpected discovery did scientists make while studying the rift event in East Africa?

  • A. Rifts can widen more quickly than previously thought.
  • B. Some magma deposits lie closer to Earth surface than geologists realized.
  • C. Volcanic activity is not necessary for rift formation.
  • D. Volcanic activity along land rifts is different from activity along underwater rifts.

4. In the lecture the professor discusses an event that occurred along a rift in East Africa. Place the stages of this event in order.

 
 
 
 

Answer Choices

  • A. Molten rock flowed into the rift and widened it.
  • B. There was a brief period of inactivity.
  • C. Seismic activity began 30 kilometers south of the northern volcanoes.
  • D. There was a series of earthquakes near the northern volcanoes.

5. According to the professor, what may eventually occur at the location of the recent rift event in East Africa?

  • A. Two tectonic plates will merge.
  • B. A deep basin will form.
  • C. A new fissure will open.
  • D. Underground earthquakes will become more frequent.

6. What does the professor imply when he says this: 🎧

“But then, in the eastern part of Africa is a complex system of rifts called, shockingly enough, the East Africa rift system.”

  • A. The East Africa Rift System is much larger than previously thought.
  • B. “East Africa Rift System” is an obvious name for the system.
  • C. The East Africa Rift System is not actually a system.
  • D. Not all of the East Africa Rift System is located in Africa.

答案:
D  C  A  DBCA(排序)  B  B 

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