Challenge Question #2

Fran Howley (grade5fh@pemetic.u98.k12.me.us)
Mon, 17 Mar 1997 16:37:20 -0500 (EST)

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Happy Spring Equinox Journey North!!!!
We have had quite a discussion up here in still icy, snowy Maine
about the reasons that every one on planet earth will have 12 hours of
daylight and 12 hours of dark on March 20th. We all agree that it has to
do with the tilt of the earth's axis and the place that the earth is in
its orbit around the sun. What has been hard for us to believe and
remember is that it is not the tilt that changes - when we look at a
model of the earth and sun we see the tilt is the same - what is
different is the earth's place in its orbit around the sun. I'd really
be interested in how others are learning about this concept.
We also have a huge graph with all the mystery
classes and it is quite obvious that all lines will meet at 12 hours on
the 20th. Sarah made a very interesting observation. She said that the
position of each of the classes on the graph was like looking at its
location on the globe.
From Grade 5 at Pemetic School in Southwest Harbor, Maine

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