EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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reaches from the core all the way out into space.
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is only at the North pole.
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is only at the South pole.
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reaches from the core to the surface of the Earth where it stops.
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Detailed explanation-1: -The magnetic field of Earth is caused by currents of electricity that flow in the molten core. These currents are hundreds of miles wide and flow at thousands of miles per hour as the earth rotates. The powerful magnetic field passes out through the core of the earth, passes through the crust and enters space.
Detailed explanation-2: -The bullet shaped magnetic bubble formed by the terrestrial magnetic field lines is called the Earth’s magnetosphere. The magnetosphere extends into the vacuum of space, on average, from approximately 60 000 kilometres sunward, and trails out more than 300 000 kilometres away from the Sun in the magnetotail.
Detailed explanation-3: -Earth’s magnetic field-also known as the geomagnetic field-is generated in our planet’s interior and extends out into space, creating a region known as the magnetosphere.
Detailed explanation-4: -The crust of the Earth has some permanent magnetization, and the Earth’s core generates its own magnetic field, sustaining the main part of the field we measure at the surface.
Detailed explanation-5: -The cooling and crystallization of the core stirs up the surrounding liquid iron, creating powerful electric currents that generate a magnetic field stretching far out into space. This magnetic field is known as the geodynamo.