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OpenStudy (anonymous):
why isnt Earth's core a permanent magnet? please answer simply
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OpenStudy (experimentx):
http://answers.yahoo.com/question/index?qid=20080508182725AAdlVe7 http://wiki.answers.com/Q/Why_is_the_earth_not_a_permanent_magnet
OpenStudy (ujjwal):
The Earth's core is much too hot to be permanently magnetized. I am not sure how hot--more than 3000 deg C I think--but permanent magnetism disappears around 500 deg. or lower, depending on the material.
OpenStudy (experimentx):
According to google, the temperature of lava is around 1300 to 1800 ... core must be much hotter.
OpenStudy (ujjwal):
yeah, and that prevents earth from being a permanent magnet.. i guess..
OpenStudy (anonymous):
in Google we trust
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