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Mystery Class Update: February 26, 1999

Today's Report Includes:

Around the Globe and Into Your Classroom!

Mrs. Berger's 5th Grade Class

The sunrise and sunset data for this week's Mystery Class report are here! Thanks to Mrs. Berger's students, for collecting this information from secret points around the globe.

Remember, this information was recorded on Monday, the same day you collected your sunrise/sunset data. (This week's sunrise/sunset times are provided at the end of this report)

Seeing The Light?
As you know, Journey North is about migration. Have you ever
wondered why we are also tracking changes in daylight? Over the next months, all the animals you track and all the signs of spring you witness will be related to daylight in one way or another.

To help you discover these connections, this would be a good time to look at the

Try This!

1. Select one of the Journey North migratory species.

2. Find out where this animal fits in the food web. (What does this animal eat, i.e.what is its prey? What is it's prey's prey? What plants does the prey eat?, etc.) Go back through the food web until you reach the sun as the source of food energy for this system.

3. Draw a diagram of your animal's food web.

4. Next, think about ways this food web changes during the seasons.

5. Now, see if you can answer:

Challenge Question #1:

"How do seasonal changes in photoperiod affect your animal's food web?"

(To respond to this Challenge Question, please follow the instructions at the end of this report.)

This Week's Sunrise/Sunset Times

Here are this week's data:

Journey North Mystery Class

Sunrise/Sunset Data

Data For: Monday, February 22, 1999

Mystery Class



# 1



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# 3



# 4



# 5



# 6



# 7



# 8



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# 10



* Mystery Class # 5 wrote to tell you that their sunrise occurred on 2/22 but sunset did not occur until 2/23. They also sent this note: "Well it's finally happened! The sun has set for the first time in 4 months... it was too late to stay up for."

** Mystery Class # 8 has experienced a one hour adjustment to its times since last week, but remember that this adjustment will NOT affect the photoperiod. Due to daylight savings time starting or ending in the coming weeks, you may see one hour changes at other locations. Again, remember that these changes will not affect the photoperiod. The sun stays up the same amount of time regardless of what time we say it is.

How to Respond to Today's Challenge Question:

1. Address an E-mail message to:
2. In the Subject Line of the message write: Challenge Question # 1
3. In the body of the message, answer the question above.

The Next Mystery Class Update Will be Posted on March 5, 1999.

Copyright 1999 Journey North. All Rights Reserved. Please send all questions, comments, and suggestions to our feedback form

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