Name: NAAP ° Lunar Phase Simulator 1/11 Lunar Phase Simulator ° Student Guide Part I: Background Material Answer the following questions after reviewing the background pages for the simulator. Page 1 ° Introduction to Moon Phases Is there a dark side of the moon? (Note: this question can be effectively answered either yes or no, so it is important to explain your reasoning.) ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ How long does it take the moon to complete one cycle of phases, in days? ____________ If the moon is full today, what phase do you expect it to be at in a week? _____________ How about one month later? _____________ Many words in astronomy also non-astronomical uses as well. Using your knowledge of how the terms on the left are used in astronomy match them with the non- astronomical uses on the right. waning convex, rounded -- also hunch-backed, having a hump gibbous to increase in size, quantity, volume, intensity, etc. waxing decrease in magnitude, importance, brilliancy, intensity, etc. Noemi Robles Yes, as the moon’s "darkside" doesn’t ever face the earth. Since, the moon rotates as does the earth the darkside doesn’t turn to face the earth. Technically, the moon doesn’t have a darkside but since it never faces earth that is what we call it. 3-4 days third quarter full moon
NAAP ° Lunar Phase Simulator 2/11 The following sketches of the moon’s appearance were made over about four weeks. Identify the phases and put them in the correct numerical order. One is labeled for you.PictureOrderPhasePictureOrderPhaseADB1waning gibbousECFPage 2 ° Introduction to Moon PhasesFrom the perspective of an observer above the North Pole, the moon moves clockwise / counter-clockwise (circle) in its orbit around the earth.In the diagram below the sun’s light is coming in from the right. The moon’s location is marked at several points on its orbit. These are the points the moon was at when the sketches above were drawn. Identify each position with the letter of the corresponding sketch.3waning crescent4first quarter5waxing gibbious6full2third quarter Page 3 ° The Time of Day
NAAP ° Lunar Phase Simulator 3/11 Use the interactive diagram at the bottom of the page to determine the direction of the earth°s rotation when viewed from above the North Pole. (Hint: rotate the observer ± the stickfigure ± to the noontime position, then sunset position, then midnight position, and finally back to sunrise position. The earth has made one complete rotation and the observer has experience one daily (diurnal) cycle of day and night.)When viewed from above the North Pole, does the earth rotate clockwise or counter-clockwise? __________________Page 4 ° Rising and SettingWhen the moon crosses the western side of the horizon plane it is rising / setting (circle). When it crosses the eastern side of the horizon plane it is rising / setting (circle).
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- Spring '11