天文学 TPO53-L4 Saturn's Rings

TPO53-L4

Saturn’s Rings



 

  1. What is the main purpose of the lecture?
  • A. To show the connection between asteroids and Saturn’s rings
  • B. To discuss theories about the formation of Saturn’s rings
  • C. To describe the composition of Saturn’s rings
  • D. To show how Saturn’s rings affect the planet’s atmosphere

 

  1. What leads scientists to believe that Saturn’s rings are much younger than the planet itself?
  • A. Most of the rings are bright and shiny.
  • B. Most of the rings are composed of complex materials.
  • C. The rings are much thinner than scientists realized.
  • D. There are small moons in between Saturn’s rings.

 

  1. Why do astronomers suspect that new material has been added to Saturn’s ring system?
  • A. The number of moons orbiting Saturn has increased over time.
  • B. The rings exist in spite of Saturn’s gravity and magnetic pull.
  • C. The tidal forces of Saturn are stronger than previously believed.
  • D. The amount of water-ice in Saturn’s rings is smaller than previously believed.

 

  1. Why does the professor mention Edouard Roche?
  • A. To explain why Saturn’s magnetic pull affects the orbits of Saturn’s moons
  • B. To explain how much gravitational force is needed to make particles coalesce into a moon
  • C. To explain how a moon might contribute material to Saturn’s ring system
  • D. To explain why asteroids are attracted to Saturn’s ring system

 

  1. Why does the professor mention the reddish color in some of Saturn’s rings?
  • A. To explain why he calls Saturn “the jewel of the solar system”
  • B. To prove that Saturn’s rings and its moons are composed of similar material
  • C. To explain how scientists realized that the ring particles vary greatly in size
  • D. To support the possibility that some rings may contain molecules from an asteroid

 

  1. Why does the professor say this: 🎧


  • A. He wants the woman to answer her own question.
  • B. He wants the woman to rephrase her question.
  • C. He is glad that the woman understands the point he just made.
  • D. He believes that more research on ring formation is needed.


答案:
B A B C D C

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