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Tuesday, February 7, 2017

Earth's magnetic field articles

Check out a Scientific American article online, as well as a NASA article on reversals. Last but not least, a NASA article about the way the earth's magnetic field is constantly moving around and changing!

From your article notes and the video notes in class, summarize how scientists know all this, especially if there were no scientists around 800,000 years ago when the earth's field last reversed!!

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