Mystery Class Update: February 21, 2003
Data Despite the Snow! Many schools in the northeastern United States were closed on Monday under record snowfalls that buried Baltimore, Boston, New York City, and Washington DC. And most other U.S. schools also were closed that day because of the Presidents' Day holiday. But that wasn't enough to stop us from gathering the third set of sunrise/sunset data from the Mystery Classes around the globe. We've got Monday's sunrise/sunset times for you below, which "neither rain, nor snow" could stop. Will your graph this week tell you any more about the locations of the Mystery Classes? More Than Daylength is Changing As you plot the changing daylength on your graphs, remember that sunlight affects all living systems. The sun is at the base of the food chain. Sunlight makes plants grow, animals eat these plants, predators prey on these animals, and so forth. As daylength changes at the Mystery Classes around the planet, stop to think about how the food chain is changing too. For example, during spring in the Northern Hemisphere, sunlight and photosynthesis increase, temperatures rise, and food production increases. The animal movements you track and the signs of spring you witness will be related to daylight in one way or another. To help you discover these connections, here's what you can do: A) Watch the Video Clip from Journey North's founder and Director, Elizabeth Howard summarizing the Sun's central connection to all life:
This Week's Sunrise/Sunset Times Remember, the secret Mystery sites recorded their times last Monday, the same day you collected your own local sunrise/sunset data. Journey North Mystery Class Sunrise/Sunset Data Data For: Monday, February 17, 2003
(Note: Military time is usually expressed without any punctuation. We have used a ":" between the hours and minutes for clarity.) Note to Teachers: Plan Ahead and Mark Your Calendars Here's the 2003 Mystery Class Schedule so you know what to expect from Journey North. Please be sure to plan ahead.
The Next Mystery Class Update Will Be Posted on February 28, 2003
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