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Moon Questions Explained

Get answers to frequently asked questions about the Moon, including its rotation, eclipses, origin, and more.

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Moon Questions Explained

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  1. Fix Astronomy Chapter 9

  2. Question 1 The synchronous rotation period of the Moon is due to A. tidal forces. B. the Earth's magnetic field. C. meteoroid impacts. D. the composition of the Moon. E. lack of lunar magnetic field.

  3. Question 2 Due to variations in the Moon's distance, if the angular diameter of the Moon is slightly less than the angular diameter of the Sun, what type of eclipse could occur? A. total lunar eclipse B. annular solar eclipse C. partial solar eclipse D. partial lunar eclipse E. total solar eclipse

  4. Question 3 Eclipses do not occur each month because A. the Moon is always in the ecliptic. B. the Moon's orbit is tilted at 7.45° with respect to the Sun. C. the Moon's orbit is tilted at 5° with respect to the ecliptic. D. the Earth's axis is tilted to the ecliptic. E. the precession of the Earth's axis.

  5. Question 4 If part of the full Moon passes through the Earth's shadow, we will see a A. total lunar eclipse. B. partial solar eclipse. C. partial lunar eclipse. D. total solar eclipse. E. total annular eclipse.

  6. Question 5 We can rule out the idea that the Earth and Moon formed at the same time from the solar nebular because A. they have different rotation rates. B. they have different densities that cannot be explained by Earth's larger gravity. C. they have different sizes. D. they have different surfaces. E. the Moon is made of metal and the Earth is made of rock.

  7. Question 6 Moon rocks contain less concentration of iron and other dense materials than equivalent rocks on Earth. A. True B. False

  8. Question 7 Which lunar features best indicate past fluid flow (molten material) on the lunar surface? A. craters B. rays C. maria D. mountains E. rilles

  9. Question 8 If the present rate of recession continues, in about 1.1 billion years, the Moon will be so distant that its umbral shadow will no longer reach Earth. Total solar eclipses will cease to be visible from the Earth. A. True B. False

  10. Question 9 Humans first walked on the surface of another body (Moon) during the flight of Apollo _____ (number), which took place on July 20, 1969. A. 8 B. 9 C. 10 D. 11 E. 12

  11. Question 10 Which theory about the origin of the Moon has gained wide acceptance over the last 20 years? A. fission B. binary accretion C. capture D. giant impact

  12. Question 11 Suppose a solar eclipse occurred today. What is the soonest that another eclipse could occur and what kind of eclipse would it be? A. a lunar eclipse 2 weeks from now B. a lunar eclipse in 1 month C. a solar eclipse 2 weeks from now D. a solar eclipse in 1 month

  13. Question 12 If the Moon did not rotate on its own axis, we would observe A. both sides of the Moon. B. trick question - it doesn't rotate. C. only one side of the Moon. D. a lack of tides on the Earth. E. only solar tides.

  14. Question 13 Consider the following hypothetical situation. A spacecraft lands on a moon of one of the planets. The moon has a smooth surface resembling that of the lunar maria. The rocks on the surface are found to be 4.5 billion years old. Why would such a finding be highly unusual? A. Such rocks are far older than any found on the Earth's moon. B. If the surface is that old, it should be heavily cratered. C. The maria rocks on the Earth's moon are much older than 4.5 billion years. D. There should not be rocks on maria.

  15. 1. A 2. B 3. C 4. C 5. B 6. A 7. C 8. A 9. D 10. D 11. A 12. A 13. B

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