“ |
The Dynamo Theory it what causes Earth's Magnetic Field
http://wiki.answers.com/Q/What_is_the_leading_theory_fo...
|
|
Earth's magnetic field - Wikipedia, the free encyclopedia
|
|
Earth's magnetic field (and the surface magnetic field ) is approximately a magnetic dipole, with the magnetic field S pole near the Earth's geographic north pole (see Magnetic North Pole) and the ...
en.wikipedia.org/wiki/Earth's_magnetic_field
|
|
“ |
Yes the outer core is liquid. Scientist believe that the core is made of metals like copper and nickle. They also believe that the outer core is rotating around the inner core. This rotation is what generates the magnetic field. Much like e...
http://answers.yahoo.com/question/index?qid=20090206220...
|
|
|
Geologic samples provide a record of geomagnetic activity that spans many billions of years of earth history. Along with modern observations, some from satellites, a history of the ebb and flow of Earth’s magnetic field can be constructed.
|
www.pa.msu.edu/sciencet/ask_st/011796.html
|
|
|
|
Does Earth's magnetic field or solar activity influence the El Nino cycle? ... Does the Earth's magnetic field daily changes affect plant germination and growth? ... What causes the Earth's magnetic field to shift, and does it do this regularly?
|
image.gsfc.nasa.gov/poetry/ask/amag.html
|
|
|
|
What causes the Earth's magnetic field to shift, and does it do this regularly? ... Some think that convective currents in the core cause the 'polar' magnetic field to undergo topology change perhaps the way we see the Sun's magnetic field operate during its cycles.
|
image.gsfc.nasa.gov/poetry/ask/a10866.html
|
|
|
Glatzmaier is keeping an eye on our planet's weakening magnetic field as he tries to learn more about how Earth's geodynamo works. The geodynamo is the mechanism that creates our planet's magnetic field, maintains it, and causes it to reverse.
|
news.nationalgeographic.com/news/2004/09/0909_040909_ea...
news.nationalgeographic.com/news/2004/09/0909_040909_earthmagfield.html
|
|
In the Earth (see image below right), the liquid metal that makes up the outer core passes through a magnetic field, which causes an electric current to flow within the liquid metal. The electric current, in turn, creates its own magnetic field—one that is stronger than the field that created it in the first place.
|
www.pbs.org/wgbh/nova/magnetic/reve-drives.html
www.pbs.org/wgbh/nova/magnetic/reve-drives.html
|
|
Simple explanation of earth magnetic field in the framework of the history of the Universe ... The Earth's magnetism is very fortunate, since it protects life on Earth from dangerous particles in the solar wind. If planets did not have magnetic fields, life would be impossible. ... Physical Environment > Earth Magnetic Field...
|
www.historyoftheuniverse.com/earthmag.html
www.historyoftheuniverse.com/earthmag.html
|
|
