Which function is preformed by earth magnetic field?

Answer 1

The Earth's magnetic field is mainly produced by electric currents in the magma or the outer core, caused probably by the temperature gradients. A small percentage is contributed by the solar wind of charged particles streaming past from the Sun.

It gradually changes direction, and over longer periods, actually reverses polarity.

The strength of the field has decreased by about 10% in the last 150 years.

Answer 2

Because of earth's iron core and it's rotation. earth spins so fast, the iron core creates a magnetic field.

The molten core of the earth spins around 4 times faster then the solid core, this causes a dynamo effect, which in turn generates a magnetic field.

Answer 3

The role of earths magnetic field is unknown however caused by the rotation of the outer core, the magnetic field protects the earth from most of the suns gamma rays stopping us being fried to bits. there is a loop whole in the magnetic field of the earth around the north pole and around the south pole therefore as the gamma rays hit the magnetic rays outside of the atmosphere they cause a spark or electrical charge of electrons being relised thus causeing the aurora borialas. however like i have said the role is unknown.

Answer 4

The field is generated by currents in the conducting material of the liquid outer core. These have several causes including temperature differences and coriolis effects.http://www.physics.org/article-questions.asp?id=64

Answer 5

Charged particles from the sun are prevented from reaching Earth.

Answer 6

The magnetic field shields the earth from solar winds and other radiations. This protects and preserves the earth's atmosphere.

Answer 7

Its main 'function' is to block most of the ultra violet radiation from the sun. Without the magnetic field - the UV radiation would be far too high to allow life to survive here.

Answer 8

Charged particles from the sun are prevented from reaching earth