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This process, in which the rotation of a planet with an iron core produces a magnetic field, is called a dynamo effect.

The Earth's magnetic core is generally inclined at an 11 degree angle from the Earth's axis of rotation.

A coil of wire wrapped around an iron core can be made magnetic by running electric current through it; the looping electrons then create a magnetic field in just the same way as the spinning electrons in individual atoms.

As long as current flows, the coil remains magnetized.

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. 1979, 1986 © Harper Collins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cite This Source Our Living Language : Magnetism is intimately linked with electricity, in that a magnetic field is established whenever electric charges are in motion, as in the flow of electrons in a wire, or the movement of electrons around an atomic nucleus.

In atoms, this invisible field consists of closed loops called lines of force that surround and run through the atom.

The radioactive carbon has six protons and eight neutrons in its nucleus, giving it a total atomic mass of 14.

This atom is not stable, and will break down, releasing nuclear energy in the process.

If a magnet is cut in two, each piece becomes a separate magnet with two poles. This is an informational tour in which students gain a basic understanding of geologic time, the evidence for events in Earth’s history, relative and absolute dating techniques, and the significance of the Geologic Time Scale.Sponsored Products are advertisements for products sold by merchants on The Earth's magnetic north pole can change in orientation (from north to south and south to north), and has many times over the millions of years that this planet has existed.The term that refers to changes in the Earth's magnetic field in the past is paleomagnetism.

If a magnet is cut in two, each piece becomes a separate magnet with two poles. This is an informational tour in which students gain a basic understanding of geologic time, the evidence for events in Earth’s history, relative and absolute dating techniques, and the significance of the Geologic Time Scale.Sponsored Products are advertisements for products sold by merchants on The Earth's magnetic north pole can change in orientation (from north to south and south to north), and has many times over the millions of years that this planet has existed.The term that refers to changes in the Earth's magnetic field in the past is paleomagnetism.When they strike ordinary atoms in the upper atmosphere, the cosmic rays smash them apart. Some of these neutrons then collide with nitrogen atoms.