- 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
- 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.
- 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.
- 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
- 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
- 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.
B A B C D C