Ans: A Section: 1-7 158. At what time of the year will the shadow of a vertical pole (a sundial) at any site in the northern hemisphere be the shortest? A) Noon, December 21, at the beginning of winter B) Noon, June 21, at the beginning of summer C) Noon, August 5, mid-summer D) Dawn, June 21, at the beginning of summer Ans: B Section: 1-7 159. At what time of the year in the northern hemisphere will your shadow in sunlight at midday be shortest? A) Mid-winter, in early January B) Mid-summer, about August 5 C) The first day of summer, about June 21 D) The first day of spring, about March 21 Ans: C Section: 1-7 160. At what average speed does the Sun appear to move across our sky with respect to the stars in order to move through one full circle in one year? A) About 13 per day B) About 1 per day C) The Sun never appears to move with respect to the stars in the sky. D) About 24 per day, or very close to 1 per hour Ans: B Section: 1-7 161. If our daytime sky were not so bright, how f