Fix Astronomy Chapter 2

1. Fix Astronomy Chapter 2

2. Question 1 How many degrees above the horizon is the Sun at noon on the summer solstice for an observer standing in the Tropic of Cancer? A. 0° (at horizon) B. 66.5° C. 23.5° D. 90° (directly overhead) E. 43°

3. Question 2 If the Moon were at first quarter two weeks ago, what would be its phase today? A. new B. full C. third (last) quarter D. waxing crescent E. waning gibbous

4. Question 3 What is the ecliptic? A. When the Moon passes in the front of the Sun. B. The Moon's apparent path about the north celestrial pole. C. The Sun's apparent path along the celestial sphere each year. D. The set of constellations commonly used in astrology to predict the future. E. When the Earth's shadow passes in front of the Moon.

5. Question 4 Why do we see essentially the same face of the Moon at all times? A. because the face points towards us only at a new phase, when it is not visible B. because the Moon does not rotate C. because the sun only illuminates one half at a time D. because the Moon's rotational and orbital periods are equal E. because the Moon has nearly a circular orbit around the Earth

6. Question 5 The angular size of the Moon and Sun is about 0.5°. A. True B. False

7. Question 6 The waxing crescent occurs just after the new Moon. A. True B. False

8. Question 7 The 23.5° tilt of the spin axis causes seasons on Earth. A. True B. False

9. Question 8 The vernal equinox occurs in the spring when the sun appears to cross the Earth's equator. A. True B. False

10. Question 9 The apparent backward movement of the planets in the heavens is called retrograde motion. A. True B. False

11. Question 10 Which of the following is NOT a phase of the Moon? A. first quarter B. new C. half D. full E. third (last) quarter

12. Question 11 If tonight at 10 p.m., the constellation Orion is visible and high in the sky, where will it be at 3 a.m. in the morning? A. further north B. further east C. further west D. same location

13. Question 12 If tonight at 10 p.m. Orion will be in a certain location in the sky, where will it be at 10 p.m. on this same date one year from now? A. further north B. further west C. further east D. same location

14. Question 13 Stars, like planets, exhibit retrograde motion. A. True B. False

15. Question 14 Suppose there is a star that rises at 10 p.m. tonight. At what time will it rise one month from now? A. 11 p.m. B. midnight C. 9 p.m. D. 8 p.m.

16. Question 15 An observer in Sao Paulo, Brazil (altitude - 23.5 degrees) sees the Sun at the zenith at noon on which day(s)? A. winter solstice (in December) B. summer solstice (in June) C. spring and fall equinox D. never - impossible

17. Question 16 An observer at a latitude of 41 degrees sees the Sun at the zenith at noon on which day(s)? A. summer and winter solstice B. spring and fall equinox C. never - impossible D. every day E. every 28 days

18. Question 17 Suppose the Moon rose at 6 p.m. yesterday. What are the approximate rising times and phase of the Moon today? A. 5 p.m. and new B. 5 p.m. and full C. 7 p.m. and new D. 7 p.m. and full

19. Question 18 If sunset is at 6:00 p.m., at what time does the waning quarter moon rise? A. noon B. never - impossible C. midnight D. 3:00 a.m. E. 3:00 p.m.

20. Question 19 • Which of the following coordinates describes the angular distance of an object north or south of the celestial equator? • Azimuth • Altitude • right ascension • declination

21. Question 20 • An observer in Quito, Ecuador (latitude 0o) sees the Sun at the zenith at noon on which day(s)? • summer and winter solstice • spring and fall equinox • never - impossible • all days • only on June 21

22. Question 21 • The sun moves eastward among the stars at the rate of about one degree per • hour • month • year • day • minute

23. Question 22 • The time that your wristwatch keeps is • apparent solar time • mean solar time • sidereal time • Greenwich mean time • a hot time

24. Question 23 • The occurrence of seasons on the Earth is due to • the Earth being closer to the Sun in summer • the Earth changing its rotation rate during the year • the Earth's axis pointing in different directions during the year • the Earth's axis being inclined to the ecliptic • the solar wind particles in the Earth's upper atmosphere

25. Question 24 • At approximately what time does the new moon rise? • sunset • sunrise • noon • midnight

26. Question 25 • Relative to the stars, the moon • remains stationary • moves eastward, then westward during a month • moves westward • moves eastward

27. Question 26 • In which of the following circumstances is it possible to observe the full moon? • setting at noon • rising at sunset • high in the sky at dawn • setting at midnight

28. Question 27 • Which of the following is true of the motion of the planet Mars among the stars? • all retrograde loops occur in the same constellation • all retrograde loops have the same shape • retrograde loops always are separated by the same interval of time • retrograde loops occur when Mars is in conjunction (near the sun in the sky

29. Question 28 • Use Figure 2.18 to find the time in Mexico City, Mexico, when it is 5 P.M. in Washington, D.C. Ignore any complications that might be caused by daylight savings time.

30. Question 29 • An observer, working at the time of the summer solstice, notes that the Sun circles about the sky at a constant altitude (23.5°). The observations are interrupted by a bear. What color is the bear?

31. D 2. C 3. C 4. D • A 6. A 7. A 8. A • A 10. C 11. C 12. D 13. B 14. D 15. B 16. C 17. D 18. B