What causes earthquakes? Where do they happen most? What should you do if you feel the earth shake? Just follow the friendly crow-in-the-know for all the answers! National Geographic supports K-12 educators with ELA Common Core Resources.Visitwww.natgeoed.org/commoncorefor more information."
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Dr. Ellen Prager is a marine scientist and author, formerly the chief scientist at the world's only undersea research station in the Florida Keys. With her ability to make science fun and understandable for people of all ages, she has built a national reputation as a spokesperson on earth and ocean science issues. She has appeared on The Today Show, Good Mor
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