天文学 TPO13-L4 Meteorites

TPO13-L4

Meteorites

Listen to part of a lecture in an Astronomy class.


  1. What is the main topic of the lecture?
  • A. The major differences between meteors and meteorites.
  • B. The origins of comets and asteroids.
  • C. The nature and origin of meteorites.
  • D. The similarities between objects in the inner solar system.

 

  1. What comparison does the professor make to help describe the composition of asteroids and comets?
  • A. He compares them to stars.
  • B. He compares them to types of planets.
  • C. He compares them to rocks on Earth.
  • D. He compares them to meteors and meteorites.

 

  1. What does the professor say about the origin of meteors and meteorites?
  • A. They are pieces of asteroids or comets.
  • B. They are pieces of the planets in our solar system.
  • C. They are made from minerals that are otherwise uncommon in our solar system.
  • D. Their origin cannot be determined.

 

  1. According to the professor, what feature of a meteoroid generally determines whether the meteoroid becomes a meteorite?
  • A. Whether it was originally part of a larger meteoroid.
  • B. Whether it originated in the inner or outer solar system.
  • C. What proportion of iron and stone it contains.
  • D. How large it is when it enters the Earth’s atmosphere.

 

  1. What are two points the professor makes about stone meteorites?
    [CHOOSE 2 ANSWERS]
  • A. They are the type of meteorite that most commonly falls to the ground.
  • B. They are type of meteorite most often seen in museums.
  • C. They are the oldest type of meteorite found on the ground.
  • D. They are the most difficult type of meteorite to find on the ground.

 

  1. Why does the professor say this: 🎧

 

  • A. To offer a hint about the answer to a question he asked.
  • B. To clarify a question that a student asked.
  • C. To find out whether students understand question he asked.
  • D. To find out whether students understand an important comparison he made.


 


答案:
C B A D AD A

 

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