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:
“If the doctors cure
then the sun sees it.
If the doctors kill
then the earth hides it.
The doctors should fear arrogance
more than cardiac arrest.”
—Anne Sexton (1928–1974)
“When it had long since outgrown his purely medical implications and become a world movement which penetrated into every field of science and every domain of the intellect: literature, the history of art, religion and prehistory; mythology, folklore, pedagogy, and what not.”
—Thomas Mann (1875–1955)