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Countdown to Mystery Class 2017: Four Months to Go |
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Autumn is here and days are getting shorter. In October, explore what causes day and night.
- Mystery Class starts January 27, 2017
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Image of the Month |
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Day and Night |
Explore: What Makes Day and Night? |
Observe, Wonder, and Predict
Observe images of the Earth from space. See how sunlight strikes the Earth over the course of a day. Explore the 24-hour cycle of changes.
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Continue to Track Changes in Day Length |
Photoperiod is a central clue in Mystery Class. Build skills by reporting your photoperiod each month.
Report
Photoperiod for
October 20 |
Report to the Map!
1. Report for October 20
2. Find your sunrise/sunset: Look-up
3. Calculate your day length (photoperiod).
4. Report your day length: Select "Daylight"
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Just for Teachers: How to Participate |
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Mystery Class is a global game of hide-and-seek. Students track seasonal changes in sunlight and then investigate other clues to find ten secret sites around the world.
Download step-by-step instructions:
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