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Tracking Changes in Photoperiod Around the Globe Mystery Class Update: February 20, 1998 Mrs. Berger's 5th Grade Class Thanks to Mrs. Berger's class, here is the second set of sunrise/sunset data from our Mystery sites around the world. Remember, this information was recorded on Monday, the same day you collected your sunrise/sunset data. As you plot this week's information on your graph, see if you can determine these things: Where is photoperiod changing the most quickly? In which places is it increasing? In which places is it decreasing? What might these things tell you about the location of each site? Newspaper Wasn't Delivered Today? Thanks to Mrs. Berger and The Time Service Dept., U.S. Naval Observatory, you now have another excellent research tool to look up your own hometown sunrise/sunset times. Mrs. Berger tells us that you can use this Internet resource to find your own sunrise and sunset times by looking them up with these URL's and using your latitude and longitude coordinates: Worldwide U.S Only Here Are This Week's Data: Journey North Mystery Class Sunrise/Sunset Data Data For: Monday, February 16, 1998 Mystery Class Sunrise Sunset # 1 7:29 20:46 # 2 7:22 18:00 # 3 0:00 * 0:00 * # 4 7:24 17:52 # 5 6:39 20:30 # 6 7:36 17:45 # 7 6:55 18:21 # 8 5:50 18:29 # 9 7:17 19:21 # 10 8:50 16:19 * Journey North Mystery Class #3 "No sunset or sunrise yet--have fun finding us!" The Next Mystery Class Update Will be Posted: February 27, 1998 Copyright 1998 Journey North. All Rights Reserved.