The cycles of the moon.docx

THE CYCLES OF THE MOON Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. The _______________ is 18 years and 111/3 days long. a. sidereal period b. synodic period c. eclipse season d. saros cycle e. eclipse year ____ 2. A solar or lunar eclipse will occur a. when the sun is near the line of nodes of the moon and the moon is new or full. b. any time the moon is new or full. c. when the sun is near the solstice and the moon is new or full. d. half-way through an eclipse year. e. when the sun is near the equinox and the moon is new or full. ____ 3. An eclipse season is the period of time during which the a. moon crosses a node in its orbit. b. sun crosses a node in the moon's orbit. c. line of nodes crosses the moon's orbit. d. moon is new or full. e. moon is visible during the day. ____ 4. If the moon enters Earth's shadow but does not reach the umbra, the eclipse is termed a. partial. b. umbral. c. penumbral. d. total. e. annular. ____ 5. Spring tides occur a. at new moon and first quarter moon. b. at first quarter and third quarter moons. c. at new moon and full moon. d. at third quarter and full moons. e. at noon and midnight. ____ 6. The synodic period of the moon a. is about 27.32 days long. b. is the period of time for the moon to orbit Earth once with respect to the stars. c. is the period of time between successive eclipses at a given location on Earth. d. is the period of time from when the moon rises until the moon rises again the next night. e. none of the above ____ 7. _______________ occur when the moon is new and the moon is full. a. Neap tides b. Spring tides c. Total solar eclipses d. Annular eclipses e. A coppery red moon will ____ 8. A solar eclipse that occurs when the moon's umbra does not reach Earth's surface is called a. a total solar eclipse. b. a partial solar eclipse. c. an annular solar eclipse. d. a penumbral solar eclipse. e. an umbral solar eclipse. ____ 9. The saros cycle a. was used in ancient times to predict eclipses. b. is 18 years, 111/3 days long. c. comes from a Greek word that means repetition. d. all of the above e. none of the above ____ 10. The _______________ moon is visible above the western horizon a couple of hours before sunrise. a. waning gibbous b. waxing gibbous c. waxing crescent d. waning crescent e. new ____ 11. The moon moves about _______________ eastward in the sky each night. a. 1° b. 5° c. 13° d. 27.3° e. 29.5° ____ 12. During a total lunar eclipse a. the moon must be new. b. the observer must be in the path of totality. c. the moon will glow a coppery red. d. the moon must be at its greatest distance from Earth. e. the date must be near the date of one of the equinoxes. ____ 13. On average the moon's umbral shadow is too a. bright to produce a total solar eclipse. b. faint to produce a total solar eclipse. c. wide to produce a total solar eclipse. d. long to produce a total solar eclipse. e. short to produce a total solar eclipse. ____ 14. A total lunar eclipse is a. visible only from the path of totality. b. visible only during a new moon. c. visible to all observers on the side of Earth from which the moon would be visible at that time. d. an opportunity to study the corona of the sun e. none of the above ____ 15. The first quarter moon rises a. at about noon. b. at sunset. c. at sunrise. d. at about midnight. e. during the second week of each calendar month. ____ 16. Total lunar eclipses always occur a. during the time of new moon. b. during the time of full moon. c. on either the vernal or autumnal equinox. d. on either the summer or winter solstice. e. when the moon is near on of the solstice points. ____ 17. Which of the following is not visible during totality of a total solar eclipse? a. the corona of the sun. b. the chromosphere of the sun. c. prominences. d. the photosphere of the sun. e. all of the above ____ 18. A waxing crescent moon is visible a. near the eastern horizon just before sunrise. b. near the eastern horizon just after sunset. c. near the western horizon just before sunrise. d. near the western horizon just after sunset. e. from sunset until sunrise ____ 19. During a total lunar eclipse, which of the following are true? I. The photosphere of the sun is obscured. II. The moon is in Earth's umbra. III. The moon is new. IV. The moon is full. a. I, III b. II, IV c. I, II, III d. II, III e. I, II, III, IV ____ 20. A totally eclipsed moon glows coppery red because a. the moon' surface is made of iron ore which is red in color. b. red light is cooler than blue light. c. during a lunar eclipse the sun is cooler than normal and its light is more red. d. red light is better able to pass completely through Earth's atmosphere and reach the moon. e. The moon appears red during a total solar eclipse, not a total lunar eclipse. ____ 21. When will the full moon be highest above the southern horizon for an observer in the Northern Hemisphere? a. at midnight near the summer solstice b. at midnight near the vernal equinox c. at midnight near the winter solstice d. at midnight near the vernal equinox e. The angle between the southern horizon and the full moon at midnight does not change with the seasons. ____ 22. A marble has a diameter of 2 cm. At what distance would the marble have an angular diameter of 1 arc second? a. 4.1 cm b. 4.1 miles c. 4.1 m d. 4.1 ft e. 4.1 km ____ 23. A total solar eclipse occurred in Wolf Point, Montana on Feb. 26, 1979. When would this eclipse again be visible in Montana? a. within 3 days of August 26, 1979 b. within 3 days of March 29, 2033 c. within 3 days of March 9. 1997 d. within 3 days of March 13, 1979 e. within 3 days of Jan. 1, 2000 ____ 24. A dime is 1.8 cm in diameter. At what distance from your eye would you have to hold a dime so that it has the same angular diameter as the full moon? a. 2 m b. 2 cm c. 2 km d. 2 inches e. 2 ft ____ 25. For an observer at 30° N latitude, what is the maximum angle between the observer's southern horizon and the moon? a. 30° b. 53.5° c. 58.5° d. 83.5° e. 88.5° True/False Indicate whether the sentence or statement is true or false. ____ 26. The third quarter moon rises at noon. ____ 27. During an annular eclipse of the sun, the corona of the sun is visible. ____ 28. A total solar eclipse will be visible from the same location on Earth one saros cycle later. ____ 29. The lunar tides on Earth are making the moon recede from Earth. ____ 30. The path of totality for a solar eclipse is swept out by the tip of the moon's umbra as the umbra moves over Earth. ____ 31. A total lunar eclipse is visible only from the path of totality. ____ 32. If you were on the moon during a total lunar eclipse, the sun would be hidden behind Earth. ____ 33. The totally eclipsed moon glows coppery red because sunlight reaches the moon's surface after passing through Earth's atmosphere. ____ 34. An eclipse season is the interval during which the sun crosses a node of the moon's orbit. ____ 35. The umbra of the moon's shadow is the region from which no part of the photosphere is visible.