GEOLOGY

Detailed explanation-1: -So it’s clear that Earth’s hot iron core isn’t what creates the magnetic field around our planet. Instead, Earth’s magnetic field is caused by a dynamo effect. The effect works in the same way as a dynamo light on a bicycle.

Detailed explanation-2: -Generated by the motion of molten iron in Earth’s core, the magnetic field protects our planet from cosmic radiation and from the charged particles emitted by our Sun. It also provides the basis for navigation with a compass.

Detailed explanation-3: -Our planet is one giant magnet, about 8, 000 miles across. The magnetic force-an electric interplay between magnetically charged metals in Earth’s core-extends outward into space for thousands of miles. This magnetosphere blocks powerful solar radiation that would otherwise destroy our atmosphere and life on the planet.

Detailed explanation-4: -The generation of Earth’s magnetic field occurs deep within the Earth’s interior, in a layer known as the outer core to be precise. Here the convective energy from the slow-moving molten iron is converted to electrical and magnetic energy, according to the U.S. Geological Survey (opens in new tab).