A diagram of the Earth's magnetic field, which near the Earth resembles that of a bar magnet. Courtesy NASA. So we could say that the Earth is, therefore, a "magnet." Magnetic field lines extend from these poles for tens of thousands of kilometers into space; this is the Earth’s magnetosphere. The Van Allen Radiation Belts -- two doughnut shaped belts that surround the Earth -- trap the rest of the harmful particles, which bounce back and forth along magnetic field lines between Earth's north and south magnetic poles like beads on a wire. How is Earth like a magnet?
Earth’s magnetic field is mostly caused by electric currents in the liquid outer core, which is mainly composed of molten iron which is conductive. Relatively close to Earth (out to about 8 Earth Radii or 50,000 km at the Equator), Earth's magnetic field looks approximately like that of a bar magnet, as shown in the figure.

The Earth behaves as if there is a giant bar magnet running through its middle from pole to pole. No one knows for sure, but there is a working theory currently making the rounds. This causes the liquid part of the core to move, which results in an electrical current. The Earth's molten core rotates at a high speed, which generates the planet's magnetic field. The currents create a magnetic field with invisible lines of force flowing between the Earth’s magnetic poles. The Earth is like a great big magnet. Photo by Staff Sgt. The north pole of the magnet is near the top of the planet, near the geographic North Pole, and the South Pole is near the geographic South Pole. ... Earth’s magnetic field has had many reversals in the past. Explain why an ordinary bar magnet doesn't rotate and align itself with Earth's magnetic field when you place it on a table. originally appeared on Quora: the place to gain and share knowledge, empowering people to learn from others and better understand the world. Photo: We can use magnetic compasses like this to navigate because Earth is itself a giant magnet. Courtesy of the Space Science Institute. The Earth is a magnet. Planet Earth: a great magnet : An artists conception of the Earth's magnetosphere. Answer Save. Our planet is a giant magnet. It swivels freely on this balance point. A great English scientist named William Gilbert answered that question in 1600 when he suggested that Earth is a giant magnet. While this field changes in intensity and location over time, it provides valuable protection against solar winds. Why do magnets point north or south? Loops of currents in the constantly moving, liquid iron create magnetic fields. The earth's magnetic field is believed to be essential for life to thrive. In the dynamo effect, the Earth's solid core transfers heat through the molten outer core and up to the surface of the planet via convection, according to Why Do. There are some strange places on Earth that make the dipole different that in the picture. Sometime in the next 10,000 years, Earth’s magnetic poles may reverse again. The Earth consists of four concentric layers: inner core, outer core, mantle and crust. You prove this each time you use a compass, but beyond that probably don't notice it much. Currently the north magnetic pole is close to Earth’s south geographic pole. The Earth is composed of layers having different chemical compositions and different physical properties. So what is really happening? 5 Answers ... Because the influence of Earth's magnetic field is unable to oppose the force of friction between the magnet and the table.

The compass needle is a small bar magnet balanced on a pin. Why does the Earth behave like a magnet? This affects every magnetic material that comes within its reach. Because it is a giant magnet. Explanation: All magnets have a pole north-seeking (abbreviated to either the pole north or N). Earth's magnetic field is mostly caused by electric currents in the liquid outer core, which is composed of conductive, molten iron. The molten iron in the Earth's core produces a magnetic field thus turning it into a giant magnet.

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