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In this activity students analyze tabulated data and convert it into a graph, search for patterns and trends, and make a prediction about future events. They discover that a graphical display of numbers may help to show patterns such as trends or varying rates of change and that such patterns sometimes can be used to make predictions about the phenomenon being graphed. This activity places the changes in Earth's magnetic field in an historical context that attemps to correct many misconceptions about Earth's magnetic field and debunk a 2003 movie that depicted dire consequences due to pole reversal.
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