a. electric currents in the core
b. magnetized iron in the core
c. magnetized iron minerals in the mantle
d. magnetized iron minerals in the crust
2007-03-07 14:10:19 · 8 answers · asked by Anonymous in Environment
B. Magnetized iron in the core!
Am I right?
2007-03-07 14:12:19 · answer #1 · answered by Goofy Foot 5 · 0⤊ 0⤋
The Earth's magnetic field is caused by electric currents in the liquid outer core.
Convection of molten iron, within the outer liquid core, along with a Coriolis effect caused by the overall planetary rotation that tends to organize these "electric currents" in rolls aligned along the north-south polar axis. When conducting fluid flows across an existing magnetic field, electric currents are induced, which in turn creates another magnetic field. When this magnetic field reinforces the original magnetic field, a dynamo is created which sustains itself. This is called the "Dynamo Theory" and it explains how the earth's magnetic field is sustained.
2007-03-07 22:28:36 · answer #2 · answered by freeman74ro 2 · 0⤊ 0⤋
B. Magnetized Iron in the core
I'm not sure on this one, but this is my best choice. Rotation of the inner core of the Earth would probably produce an electromagnet.
2007-03-07 22:13:48 · answer #3 · answered by Nescio sed Scio 2 · 0⤊ 0⤋
The earth’s magnetic field probably originates in Wal-Mart, aisle 12.
2007-03-07 22:12:52 · answer #4 · answered by Anonymous · 1⤊ 0⤋
it's b
2007-03-07 22:24:21 · answer #5 · answered by aldrin m 2 · 0⤊ 0⤋
B
2007-03-07 22:17:09 · answer #6 · answered by dave 2 · 0⤊ 0⤋
a.
2007-03-07 22:12:59 · answer #7 · answered by lionel ferrao 2 · 0⤊ 1⤋
MY BUTT
2007-03-07 22:12:34 · answer #8 · answered by man 1 · 0⤊ 2⤋