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☆☆☆☆☆pole reversals seafloor spreading
the inner core
. The south magnetic pole of the compass points to Earth's north magnetic pole.
Wondering slowly with no pattern
movement of ocean crust.
magnetic north
north pole =magnetic south
magnetic south
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Exactly, but FYI, if interested:
A compass only functions as an indicator to "Magnetic North" because the magnetic bar at the heart of the compass aligns itself to one of the lines of Earth's magnetic field.
However, consider two bar magnets, you will find that if you try to push like poles together, they will repel one another.
Thus the end of a bar magnet that actually points to Earth's northern magnetic pole is the southern pole of the bar magnet.
Thus the "north pointer" end of a compass pointer is actually the southern end of the magnet in the compass.
Furthermore, if you care, lol, The difference between Magnetic North and Geographic North is important if you are using a compass to navigate. For us, the difference would throw us off only 1.5 degrees, which is only significant if you are doing precise orienteering.
In Alaska and other places near the poles, North and South, the difference between Geographic North and Magnetic North is a big deal! Local maps generally contain a note and graphic showing the difference between MN and GN for the area of the map.
http://wiki.answers.com/Which_pole_of_a_magnet_points_towards_the_geographical_North#ixzz17Bd5cY3j
The Core
compass magnets can be deflected by earths magnetic field or other permanent magnets
Reverse
Its Thrust!
For starters, the thing you will need for all storms is Low Air Pressure. So you will always need this for all thunderstorms.
The oldest continental crust would be between three and one half to four billion years older than the oldest oceanic crust. This is due to the fact that ocean plates are subducted under the continental plates, subjected to partial melt and essentially recycled in the mantle before reforming.
The continental crust is up to 70 km thick.
Tidal heating supports the dynamo theory. Magnetized lunar rocks and asteroids are used for evidence of this.
http://phys.org/news/2012-10-evidence-dynamo-asteroid.html
Earth's outer core contains liquids that conduct electricity.
Earth's outer core is a liquid. Earth's core contains mostly iron and nickel.
