MAGNETIC EARTH

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MAGNETIC EARTH
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MAGNETIC EARTH
-Any magnet, no matter what shape, has two ends
called ____________ ____________.
magnetic
poles
-The earth is no different. It has a North and a
South pole just has any bar magnet does. The
magnetic field goes from the ____________ pole
to the _____________ pole.
north
south
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-The magnetic properties of the earth were
discovered by
__________________________. He
discovered that a ______________
points in the same direction no matter
where on Earth you were.
Sir William Gilbert
compass
The only thing that could logically explain
this is that the Earth acts like a giant
_________________.
magnet
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-The geographic North pole (the north pole found
on a globe or map) is based upon being
________________ to the equator and the axis of
our rotation. The Magnetic North pole is not
found at the
perpendicular
N
same place. The magnetic poles axis
is tilted a bit from the rotational axis.
Therefore, when you are using a
compass you are not actually traveling to
the true (geographic) North pole, but
instead the ________________ North Pole.
magnetic
(equator)
S
(North pole on the map)
(North pole that a compass points to)
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The angle between geographic north and the
magnetic north to which a compass needle points
is called ____________________ ___________________
_
magnetic
declination
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-The earths magnetic field affects areas further
than just on the surface of the earth. The
magnetic field actually extends on into
____________. This magnetic field affects the
movement of electrically charged _________________
in space. A particular region above the Earths
surface that contains _______________ and
______________ traveling at very high speeds is
called the ___________________________. The
______ produces similar electrically charged
particles. A stream of these electrically
charged particles flowing at high speeds from the
sun is called _____________________. The solar
wind pushes against the Earths magnetic field
and surrounds it. The region of the Earths
magnetic field confined by the solar winds is
called the _____________.
outer space
particles
electrons
protons
Van Allen Belts
sun
solar wind
magnetosphere
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-Most of the particles from the solar wind cannot
penetrate the Earths magnetic field, which is
good since they can be harmful to us. However,
there are two points where you can see that the
particles could reach the Earths surface and
they are ________________ ____________. When
these particles get close to the Earths surface,
they interact with the atoms in the
_____________________. This interaction gives
off light. A glowing region caused by charged
particles form the sun is called an
______________. This phenomenon in the northern
hemisphere is called ________________________or
________________________. In the southern
hemisphere this is called ________________________
or _________________________.
north pole
south pole
atmosphere
aurora
northern lights
Aurora Borealis
Aurora Australis
southern lights
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-The earth can make some objects magnetic just
like we induced magnetism on a nail with a bar
magnet. Some metal (ferromagnetic) objects that
sit out for many years and have not been moved my
have their _______________ aligned by the Earths
magnetic field. Ex. -Deep in the ocean the
Earth is forming new rocks from liquid hot magma.
As these rocks cool the iron in them is locked
in place and align with the Earths current
____________________. Looking at these rocks we
can see that the Earths magnetic field changes
__________________ and ________________ about
every million years our so. This is also proof
of ____________________________.
domains
file cabinets, refrigerator, Space Needle, Eifel
Tower
magnetic field
direction
strength
plate tectonics