Megnatic Field Of Earth

Yes. I don't think it's known for sure how, but a good guess is the motion of liquid-state metals in Earth's core, like iron.

 

And there have been declines for unknown reasons in recent times...as well as shifts of north and south poles over the millenia...just wait until the man made global warming kooks find out that the magnetic field is about to undergo another upheaveal!!!

another strange effect is that the north and south poles drift over time...deviation and variation are the two most importasnt variants in navigation

http://en.wikipedia.org/wiki/Magnetic_variation#Variation

 

There are moving charges in it ;)

 

Don't worry you're not as embarrassed as physics.
The Earth's magnetic field is amazingly poorly understood even today, which is why we get away with handwaving explanations of the 'dynamo effect'.

There are possible explanations from second order effects of a moving conductive (but overall uncharged) fluid moving in a field - a little like how the corriolis effect is a second-order effect of a rotating earth.

 

If the earth is spinning doesn't that mean that the iron or whatever it is in the earth's core must be spinning. and when you spin isn't there acceleration? is it possible that in the earths core there is created some sort of strong electric field?

 

Important ones are:
Compass needles point north.
The effect of shielding us from solar radiation from the sun.

 

even with CONSTANT angular velocity don't you get acceleration. towards the centre maybe? and then an electric field would be created magically causing a magnetic field to form perpendicular to a vector towards the centre of the earth, thereby pointing maybe to a north and south pole? . just speculating.

 

maybe there are different materials inside the centre of the earth. and if the earth is spinning those materials are forced to the outside of the inner core. and then since those materials have different densities there could also be a distinct line that divides those two materials. even a third material between two materials. and if that third material has enough energy from heat could it accelerate electrons across a potential or something insane like that.

 

Well average acceleration is 0, but so is the average electric field. At any given moment there would be a changing electric field, which induces a magnetic field perpendicularly to that. I doubt I would provide you a fulfilling explanation. They do spin magnets in many devices though, try googling that.

 

I think someone a long time ago buried a very large copper coil and batteries

 

the magnetic field isn't uniform to my knowledge. is it?

 

try checking out this link i found right at the bottom of the page.

https://www.physicsforums.com/showthread.php?t=272847

 

hmm. well lets say that we have molten metal in the centre of the earth constantly rotating. the net magnetic flux would be the same wouldnt it? yeah i dont know fiz, i dont know.

 

Doesn't it seem odd that we define the magnetic field of Earth (a bar magnet) by using another bar magnet (a compass)? Isn't the use of a compass a formal self referring definition? Goedel proved that self referring systems will have places that are either incomplete or inconsistent. (a paraphrase) If this is true, what than is the incompleteness and/or inconsistency that one might expect in the magnetic fields around earth; or say in the simplier case of another bar magnet?

 

Some researchers are wondering if Earth's oceans have something to do with it.

"His research suggests that Earth’s magnetism is actually linked to ocean movements. The salt in seawater allows it to conduct electricity, meaning it generates electrical and magnetic fields as it moves."

http://www.timesonline.co.uk/tol/news/science/article6493481.ece

What do you guys think?

 

salt water doesn't conduct electricity that well. But there are two people who say it could be valid who are much smarter than I. ill leave it at im quite skeptical.