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Earth And Magnetism
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Earth and Magnetism
Answers to Common Questions
The magnetic field created by mantle's internal motions produces the magnetosphere which protects the Earth's atmosphere from the solar wind. ChaCha on!
Early ideas about what caused the compass needle to point toward the north included some divine attraction to the polestar (North Star), or attraction to large masses of iron ore in the arctic. A more serious hypothesis considered the Ear...
The Earths magnetic field can be simplified to a dipole (bar magnet) magnetic structure. It is thought to be produced by chemical and electrical activity within the earths core. The Earths field is measured in polar co-ordinates, as inclina...
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Answers to Other Common Questions
The short answer is that we are not entirely sure why Earth has a magnetic field. The other answer posted here simply states that the outer core acts like a magnet. This implies that it is like that magnets that people put on their refriger...
http://www.answerbag.com/q_view/31613/date?ref=W_Ask&...
6x10-5 Tesla at its strongest, near the poles. Although this includes effects of solar wind and other aspects of external origin, Gauss concluded in 1838 that most of it comes from the field of internal origin, predominantly a dipole.
http://www.its.caltech.edu/%7Ealex/Explanations/Q&Aabou...
The origin of the magnetic field is still a question that has not been fully resolved, but many geophysicists believe it is generated as the rotation of the earth causes slow movements in the liquid outer core which consists predominantly o...
http://wiki.answers.com/Q/Is+there+magnetism+on+earth
Summary: Earth has a magnetic field with certain points that are considered poles, and a pole occurs when a magnetic field is at a 90-degree angle. Discover how the magnetic north and south poles are different from the geographic north and ...
http://www.ehow.com/how_4872826_where-earths-magnetic-p...
Replying to: Does anyone have any information on whether the Earth's magnetic field is in the process of reversing? And if so, does this mean that perhaps our current low magnetic field could be indicitive of a reversal? The Wikipedia has...
http://www.space.com/common/forums/viewtopic.php?f=10&t...
I would like to know if the effect of all the electricity generated by power plants etc. on the Earth's magnetic field would also contribute to this problem. Reply A quick answer is no , for several reasons. The world uses alternating curre...
http://www-istp.gsfc.nasa.gov/earthmag/magnQ&A3.htm#q42
The earth's magnetism is mainly caused by it's molten core! When anything is brought to a molten state it creates magnetism! If you go into an iron ore plant the tanks are magnetic! The Sun is a giant magnet, and all planets with a molten c...
http://www.blurtit.com/q933472.html