• Earth has a magnetic field that behaves like a giant bar magnet inside the planet.
  • People can navigate by finding magnetic north.
  • The magnetic field is created by the movement of molten metal in the outer core.
  • The North Magnetic Pole is not the same as the geographic North Pole.
  • Scientists are not sure why this happens, but the fact that it does happen is useful to scientists.
  • In the chapter Plate Tectonics, you'll learn how to collect cores from rocks at the Mid-Atlantic Ridge.
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