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If your students are fascinated by solar eclipses, you can access a history of them by decade and more at NASA's Eclipse website. Middle and high school educators and others can learn about eclipses that occurred or will occur during a 10-year span. The tables describe an eclipse's calendar date, TD...
Grade Level   6 7 8 9 10 11 12
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Published in 2000
"Gases trapped in ice cores show the dramatic impact that human activities have had on the planet since the Industrial Revolution. This graph, from the website accompanying the FRONTALINE/NOVA special """"""""What's Up with the Weather?-"""""""" reveals how atmospheric carbon dioxide, methane, and...
Grade Level   11 12
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