天文学 TPO18-L1 Sunspots

TPO18-L1

Sunspots

Listen to part of a lecture in an astronomy class.

 



  1. What is the lecture mainly about?
  • A. The importance of record keeping in the development of hypotheses.
  • B. The relationship between sunspots and Earth’s geomagnetic cycle.
  • C. The progression of scientific knowledge about sunspots.
  • D. The effect of sunspots on Earth’s climate.

 

  1. Why did European astronomers before the time of Galileo not believe sunspots were on the Sun’s surface?
  • A. They based their beliefs on earlier observations by Chinese astronomers.
  • B. The idea was contrary to their beliefs about objects in space.
  • C. The sunspots often changed their shape.
  • D. The sunspots were not always visible.

 

  1. Which hypothesis regarding sunspots did Galileo challenge?
  • A. Sunspots are shadows of planets crossing the Sun.
  • B. Sunspots are clouds in the solar atmosphere.
  • C. Sunspots are evidence of the Sun’s rotation.
  • D. Sunspots are evidence of magnetic fields.

 

  1. What was the importance of Schwabe’s observations?
  • A. They determined the age of sunspots.
  • B. They established that sunspots appear in cycles.
  • C. They proved that sunspots were actually on the Sun.
  • D. They showed the reason that sunspots change their shape

 

  1. What is the professor’s attitude toward Schwabe’s and Wolf’s research?
  • A. He is surprised that the research is contradictory.
  • B. He is impressed by how many years were spent on the research.
  • C. He has difficulty believing that research should take so long.
  • D. He doubts that the research is given enough credit by modern astronomers.

 

  1. Why does the professor imply about the discovery of a relationship between the sunspot cycle and Earth’s geomagnetic cycle?
  • A. It proved that Galileo’s cloud hypothesis was correct.
  • B. It showed how conditions on Earth can affect the Sun.
  • C. It was the start of modern astronomy.
  • D. It led to a period of intense scientific research.


答案:
C B A B B D

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