Plotted theoretical crater diameter sizes vs. meteorite diameters. Then, they worked backwards and determine the probable size of the 65 mya meteorite, the Barranger meteorite, and a few others by using Google earth to measure crater diameters. For providing some basic information from a meteorite...
Grade Level   K 1 2 3 4 5 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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