地球科学 TPO35-L4 Permian Extinction

地球科学

TPO35-L4 Permian Extinction

Listen to part of a lecture in an Earth science class.

 



  1. What does the professor mainly discuss?
  • A. New evidence about what happened to dinosaurs.
  • B. New methods for gathering evidence about mass extinctions.
  • C. The link between two mascons from the Permian period.
  • D. A possible cause of the Permian extinction

 

  1. According to the professor, why did researchers begin looking for evidence that an asteroid may have caused the Permian extinction?
  • A. They discovery that mascons on the Moon were caused by asteroid impacts.
  • B. They found rock samples in Wilkes Land that appeared to be 250 million years old.
  • C. The theory that an asteroid caused the dinosaur extinction gained acceptance.
  • D. The theory about a decline in seawater oxygen levels proved to be false.

 

  1. Why does the professor mention getting a bump on the head?
  • A. To help students understand an explanation of how a mascon forms
  • B. To illustrate a theory about how the supercontinent broke apart
  • C. To show the relationship between an asteroid and the dinosaur extinction
  • D. To compare the dinosaur extinction to the Permian extinction

 

  1. What did researchers notice that could be evidence of an asteroid impact in Wilkes Land?
  • A. A ring of ice containing a high concentration of oxygen.
  • B. A portion of Earth’s crust that is less dense than normal.
  • C. Extraterrestrial rock fragments lying below the ice.
  • D. Relatively high gravity measurements in the center of a circular ridge.

 

  1. What does the professor emphasize about some of the rock samples taken from the Bedout High near Australia?
    [CHOOSE 2 ANSWERS]
  • A. They are similar to the samples from the Yucatan peninsula in Mexico.
  • B. They are from the same time period as the Permian extinction.
  • C. They have been exposed to extreme temperatures and pressure.
  • D. They contain fossils of many species that are now extinct.

 

  1. What does the professor imply when he says this: 🎧
  • A. The student should read the assignments before coming to class.
  • B. The student has not fully understood a statement in the textbook.
  • C. The student has not provided sufficient evidence to disprove the theory in the textbook.
  • D. The only reasonable explanation is the theory that the student suggests.



答案:
D C A D BC B


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