Why does the earth even have a magnetic field?
Let’s learn why does the earth even have a magnetic field. The most accurate or helpful solution is served by Yahoo! Answers.
There are ten answers to this question.
Best solution
The earth's magnetic field is known to have varied in intensity (Gee et al. 2000) and reversed in polarity numerous times in the earth's history. This is entirely consistent with conventional models (Glatzmaier and Roberts 1995) and geophysical evidence...
Answer:
Everything a creationist does not understand is proof to him/her that "God did it"!
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Other solutions
How do compasses work if the Earth has such a weak magnetic field? Seems like since Earth has only 1/2 a Guass of magnetic energy, it seems like compasses "should not" work since nowadays, our society has so many man-made things that generate...
Answer:
Indeed compasses do not work if close enough to other sources of magnetism than Earth's background magnetic...
David J at Yahoo! Answers Mark as irrelevant Undo
How do compasses work if the Earth has such a weak magnetic field? Seems like since Earth has only 1/2 a Guass of magnetic energy, it seems like compasses "should not" work since nowadays, our society has so many man-made things that generate...
Answer:
Indeed compasses do not work if close enough to other sources of magnetism than Earth's background magnetic...
M.B at Yahoo! Answers Mark as irrelevant Undo
Some time ago a man named Nicholae Tesla realized that the Earth is a huge electrical generator. He said that if humanity could create a copper cable long enough to circumnavigate the earth from South pole to North pole and back, we could use the power...
Answer:
NASA did an experiment in space that showed that this idea might work. They strung a wire out from the...
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Samples of the ocean floor show that the Earth's magnetic field undergoes periodic reversals, at several thousand year intervals. Since humans have developed technology there have been no such reversals, but some say it could happen again in 10-20 years...
Answer:
There is no fossil evidence implicating any of the thousands of pole reversals in the past as a cause...
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Why are Faraday cages not able to block static or slowly varying magnetic fields? How can you block the Earth's magnetic field?
Answer:
A Faraday cage is intended to give protection against electric fields. It also works against propagating...
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I know that metals lose their magnetism above the curie temperature which is somewhere around 500C for iron, and that the Earth's metallic core is above this temperature. So I don't understand how there can be a powerful magnetic field surrounding the...
Answer:
It is not just pure iron - it is an alloy of iron and nickel. That alloy is in constant motion and,...
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My understanding is that the magnetic field is decreasing as time passes.
Answer:
I read something recently that the inside of the earth is cooling and our magnetic field is fading....
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not only us.. everything that's on earth .. why magnets attract only iron? then how come everything falls down on the surface of earth and it's related to magnetic force?
Answer:
We are attracted by gravity - the magnetic force is much much weaker and we only have a small amount...
JITKO4N4HEJ3275IM4PA3NDYHY at Yahoo! Answers Mark as irrelevant Undo
Type of earth magnetic field
Answer:
Gravity is not caused by magnets. It is caused by matter itself, but it only happens noticably when...
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