Unformatted text preview: millions of years the earth has changed polarity and it is seen near divergent boundries at the mid ocean ridges. The polarity changes as you get further from the ridge. It is evident that in the future we will reverse polarity. 9) Erosion is the natural or chemical breakdown of rocks and minerals. 11) Convection deep in the earths core....
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- Fall '07
- Structure of the Earth, Mantle, upper mantle, Andrew Vile