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:
“Man feeds the earth; the earth feeds man.”
—Chinese proverb.
“He stung me first and stung me afterward.
He rolled me off the field head over heels
And would not listen to my explanations.”
—Robert Frost (1874–1963)