1. What is the main purpose of the lecture?
- A. To discuss similarities in how Earth’s Moon and IO originally formed
- B. To compare and contrast Jupiter’s four Galilean moons
- C. To explain why IO differs so greatly from Earth’s Moon
- D. To demonstrate how tidal forces affect Jupiter
2. What discovery by the Voyager spacecraft does the professor mention?
- A. IO is volcanically active
- B. IO has several large impact craters
- C. IO’s orbit is highly irregular
- D. IO is closer to Jupiter than previously thought
3. What effect of Jupiter’s gravitational force does the professor emphasize?
- A. It causes variations in the shape of IO’s surface
- B. It causes variations in IO’s rate of spin
- C. It causes ocean levels on IO to rise and fall
- D. It keeps the same side of IO always facing Jupiter
4. What factors does the professor mention that help explain IO’s internal heat?
[CHOOSE 2 ANSWERS]
- A. Two of Jupiter’s other moons affect IO’s orbit.
- B. IO still retains much of the internal heat that it had when it formed.
- C. Heat radiating from Jupiter is absorbed by IO’s rocky surface.
- D. Rock movement in IO’s interior causes friction.
5. What do the findings of the study of Europa and Ganymede imply?
- A. IO’s orbit will gradually become more irregular
- B. Volcanic activity on IO will eventually decrease
- C. Jupiter’s gravitational pull on IO will weaken
- D. Europa and Ganymede will move closer to Jupiter
6. Why does the professor say this: 🎧
- A. To indicate that he does not like to be interrupted
- B. To confirm the student’s conclusion
- C. To remind the student that the point was covered in a previous class
- D. To indicate that he wanted to change the topic
答案：C A A AD B B