Earth's Electromagnetic Field
An electromagnet is a magnet that is created by a current that flows around a soft iron core. Earth has a solid iron inner core surrounded by semi-liquid materials of the outer core that move in continuous currents around the inner core; therefore, the Earth is an electromagnet. This is referred to as the dynamo theory of Earth's magnetism.
Read more about this topic: Earth Science
Famous quotes containing the words earth and/or field:
“All sorts of flowers the which on earth do spring
In goodly colours gloriously arrayed;
Go to my love, where she is careless laid,”
—Edmund Spenser (1552?–1599)
“A field of water betrays the spirit that is in the air. It is continually receiving new life and motion from above. It is intermediate in its nature between land and sky.”
—Henry David Thoreau (1817–1862)