11.10

1. Listen to Track 101.
  
  Now answer the questions.
2. What is the lecture primarily about?
  1. Illustrating how planets orbit the Sun
  2. Exploring the concept of the “Goldilocks zone”
  3. Describing the plan to colonize other planets in the future
  4. Explaining the development of solar systems
3. According to the professor, what is true of Goldilocks planets?
  1. They are roughly the same size as Earth.
  2. They are located between other planets in a solar system.
  3. They do not have a substantial atmosphere.
  4. They can potentially support liquid water.
4. What does the professor imply about the planet Venus? Choose 2 answers.
  1. Its core is likely composed of lead.
  2. It is too hot to sustain life as we know it.
  3. It is sometimes located in the habitable zone.
  4. It has an insignificant atmosphere.
5. According to the lecture, what is the possible significance of several of the planets recently found orbiting the star TRAPPIST-1?
  1. They demonstrate how advanced telescopes have become.
  2. They are useful for studying the atmosphere of distant planets.
  3. They are in the habitable zone.
  4. They are the only known Goldilocks planets other than Earth.
1. Listen to Track 102.
  
  Now answer the question.
2. Why does the professor say this?
  1. To explain that being in the habitable zone is not the only requirement for life to exist on a planet
  2. To stress the importance of the position of the Goldilocks planets orbiting TRAPPIST-1
  3. To explain why life on Earth is able to exist
  4. To describe how researchers determine the size of a habitable zone
4. 1. Listen to Track 103.
    
    Now answer the question.
  2. Why does the student say this?
    1. To share his opinion on the issue at hand
    2. To remind the professor of an earlier question
    3. To express his disapproval of the professor’s comment
    4. To verify his understanding of a previous statement