Ch10 - Assignment: Chapter 10 Class: Astronomy I Date:...

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Assignment: Chapter 10 Class: Astronomy I Date: October 1 st , 2007 Review Questions 1. Because the Moon exerts just as much gravitational force on the Earth as the Earth does on the Moon, it is not correct to say that the Moon orbits around the Earth. Instead, they both orbit around a point between their centers called the center of mass of the Earth-Moon system. 2. If one observes the Moon’s phases more carefully and with more patience, one can see slightly more than half the lunar surface because the Moon appears to wobble slightly over the course of an orbit. The Moon seems to rock back and forth around its north-south axis and to nod up and down in a north-south direction. 3. Since there is no atmosphere on the Moon to scatter sunlight, the daytime sky appears as black as the nighttime sky on the Earth. 4. Because there is no atmosphere on the Moon to push down the water molecules with pressure, no liquid water can exist on the surface of the Moon. The Moon’s gravity is too weak to hold any molecules within its atmosphere, so all of the molecules escaped the Moon’s atmosphere a long time ago. 5. The astronauts wear spacesuits on the Moon to provide oxygen for breathing, to regulate body temperature, and to protect against ultraviolet radiation from the Sun. Because the Moon has no atmosphere, the consequences can be harmful to astronauts without controlling spacesuits. However, the lack of atmosphere does not cause their blood to boil. 6. The absence of atmosphere on the Moon allows anyone to get a clear view of several different types of lunar features with a small telescope or binoculars. These include craters, dark-colored maria, and the light-colored lunar highlands or terrae. 7. Since the meteoroid striking the lunar surfaces generates a shock wave over the surface outward from the point of impact, the impact causes craters much larger than the size of the actual meteoroid. 8.
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Ch10 - Assignment: Chapter 10 Class: Astronomy I Date:...

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