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The new discovery indicates that the intensity of Earth's magnetic field is decreasing 10 times faster, leading some geophysicists to predict a reversal within a few thousand years.

The new discovery indicates that the intensity of Earth's magnetic field is decreasing 10 times faster, leading some geophysicists to predict a reversal within a few thousand years.

best of the best

This figure-8 path that the sun makes in the sky is called the analemma. On some days you might notice that the sun is not in the sky where, according to the time on your watch, you would expect it to be.

This experiment can only be done at solar noon twice a year; at the spring and autumnal equinox. These are the two times the sun is directly over the equator. You can do this experiment one or two days before or after the equinox to work around cloudy day

great site

my classroom video, picked up by a big local blog on earthday

I liked this one to initiate lessons in writing and making

Earthday Poems

Great links

some resources

Earth day game for K-2 from BBC School

Going green is always great! Let's help slow down global warming! PHILLY is!

Besides producing Cream Cheese, PHILLY is also doing its part in practicing in eco-friendly operations.