Mystery Class Update: February 22, 2008

Today's Report Includes:


True or False?
"Special powers cause eggs to balance on their own,
but only on the equinox."
>>

This Week's: Data, Questions and Journal

Sunrise/Sunset Data for Monday, Feb 18 New!
This Week's Questions (Handout)
Mystery Class Journal
(Journal page)

You now have four weeks of sunrise/sunset data. Are you able to determine where the Mystery Classes are located in relation to your own hometown? Also, do you notice anything new "coming to light" in this week's data? In your journal, describe what you notice. What does this tell you?
Earth's Seasonal Cycles: The Connection between Daylength and Latitude

Have you discovered that changing photoperiods reveal important clues about the latitude of a location? How much do you know so far about the latitude of the Mystery Classes? Try the questions in this week's Handout above.

Build your Understanding about Earth's Seasonal Cycles >>

Earth's Daily Cycles: The Connection between Time of Day and Longitude

In contrast to earth's seasonal cycles, daily cycles -- such as the time of day when an event occurs -- can reveal important clues about the longitude of a location. You'll actually see how this works in two weeks, when the Longitude Clues are given and you learn how to estimate the Mystery Classes' longitude from the time of day when sunrise occurs.

But first, here are two key concepts that you will need to make the connection between daily cycles and longitude, and to get closer to unlocking the locations of the Mystery Classes:

1) What Causes the Sun to Rise and Set?

Have you ever wondered if the sun really "rises" and "sets" ?

Or is something else going on that just makes it appear that way?

Build Your Understanding About
Earth's Daily Cycle >>

2) Greenwich Mean Time (GMT)

How can a time keeping system based on one single time zone keep the other twenty-three zones on schedule?

Learn more about GMT >>

Links: This Week's Mystery Class Resources 
Lessons: More About the Coming Longitude Clues
  • A Clue About the Longitude Clues: Why They Only Work on the Equinox
    • Teachers Guide >>
    • Slideshow >>
  • Who Wanted to be a Millionaire? The 1714 Longitude Contest >>

Materials and More:

  • How to Participate, Data Sheets and Graphs >>
  • Quick links to weekly updates, data, tips and resources >>

Mystery Class Deadlines:

  • Know What to Expect and When -- Mark your Calendars >>
More Mystery Class Lessons and Teaching Ideas!


The Next Mystery Classs Update Will Be Posted on February 29, 2008.