1. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Fix Astronomy Chapter 9

2. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 6 Moon rocks contain less concentration of iron and other dense materials than equivalent rocks on Earth. A. True B. False

8. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 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. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1. A2. B3. C4. C 5. B6. A7. C8. A 9. D10. D11. A12. A 13. B