1. What is the main purpose of the lecture?
- A. To discuss a challenge that must be overcome before people can live on the Moon
- B. To explain some advantages and disadvantages of building a colony on the Moon
- C. To question the reliability of some of the experiments conducted on lunar soil
- D. To describe the discovery of an atmosphere on the Moon
2. Why does the professor mention oxide compounds in the regolith?
- A. To point out that multiple techniques might be required to extract oxygen from the various compounds
- B. To propose that the trace amounts of oxygen in the Moon’s atmosphere escaped from the regolith
- C. To emphasize that the regolith is gray because of its high aluminum oxide content
- D. To point out that lunar soil contains large quantities of oxygen
3. What points does the professor emphasize about soil samples collected during the Apollo space missions?
[CHOOSE 2 ANSWERS]
- A. They are less abrasive than simulated lunar soil.
- B. Some of their properties may have changed.
- C. Each sample was taken from a different layer of the regolith.
- D. There are very few of them left for research.
4. What point does the professor make when he discusses the formation of lunar soil?
- A. The formation process can be replicated using vacuum pyrolysis.
- B. The number of complex compounds in lunar soil is lower than scientists expected.
- C. Lunar soil is a product of repeated exposure to violent forces.
- D. Lunar soil is comprised primarily of iron compounds.
5. What does the professor imply when he mentions that lunar soil is electrically charged?
- A. Lunar soil might interfere with the operation of equipment on the Moon.
- B. Lunar soil could be used as a power source on the Moon.
- C. Electrical charges on the Moon are less powerful than those on Earth.
- D. Extracting oxygen from lunar soil might be easier than previously thought.
6. Listen to part of the lecture, then answer the question:
Why does the professor say this: 🎧
- A. To suggest that the answer to his question is obvious
- B. To suggest that it is not necessary to collect more lunar soil samples
- C. To introduce an explanation that might be unexpected
- D. To ask the students to recall what they have learned so far