TPO13-L4
Meteorites
Listen to part of a lecture in an Astronomy class.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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