Mystery Classes Photoperiod Data

• Data for Friday, March 11
• Record and Graph

Local Photoperiod Data

• Look up your data for March 11
• Record and Graph
• Report to map, select Daylight
  

Resources

• Participation Guide
• Need Modifications? Contact Us
  

• Explore the Map
• Guiding Questions

Make one copy for locating each Mystery Class site.

Sunrise on the Equinox

View animation as you work. You can estimate the longitude of each mystery site with the Time Clues and these key facts:

• The Earth turns to the east as it rotates.
• It spins 1 degree longitude every 4 minutes.
• The time between sunrise at the Prime Meridian and sunrise at a mystery site on the equinox reveals approximate longitude.

Next Update March 18, 2016