why isnt Earth's core a permanent magnet? please answer simply

Question

experimentx · Answer

http://answers.yahoo.com/question/index?qid=20080508182725AAdlVe7 http://wiki.answers.com/Q/Why_is_the_earth_not_a_permanent_magnet

ujjwal · Answer

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.

experimentx · Answer

According to google, the temperature of lava is around 1300 to 1800 ... core must be much hotter.

ujjwal · Answer

yeah, and that prevents earth from being a permanent magnet.. i guess..

anonymous · Answer

in Google we trust