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04/15/10(Thu)05:04:11 No.217010XXX>>217010116
So
now I guess you're wondering "if the magnets need a magnet to become
magnets, where is the original magnet?" The answer is in front of your
nose, as well as below your feet. The entire planet Earth is a weak
magnet. This is why compass needles (which are merely magnetized pins)
face north. The secondary core of the earth contains molten iron and
lots of it. It is so hot, none of the iron molecules can bond to form a
solid. They are being sloshed around in the magma. The earth's magnetic
field, which is constant, slowly magnetizes this iron. Eventually, some
of the iron makes it to the surface due to tectonic shift and volcanic
eruptions. When they cool, they bond with each other, because they are
all tiny magnets and are thus attracted to each other. When this
iron-rich rock cools, it becomes magnetite or a lodestone. These
naturally magnetic rocks are what clued early scientist in to the force
in the first place.
The Earth's magnetic field is the reason we
are able to survive the sun's harsh rays on this planet. A constant
radioactive beam is being shot at us by the sun. It is a byproduct of
the sun's fusion core, and it is colloquially called "solar wind". The
solar wind encounters the Earth's constant magnetic field and is
refracted away from the planet, creating the colorful lightships we call
the Auroras. |
