Meaning of the Earth’s Core (What it is, Concept and Definition)

What is the Earth’s Core:

The core of the Earth is deepest and hottest layer on the planetis solid and spherical in shape.

The Earth is made up of three important layers called geosphere (solid), hydrosphere (composed of salty or sweet liquids in a gaseous or solid state) and atmosphere (formed by various gases).

Now, the Earth’s core is made up of metals, mainly iron and nickel, and to a lesser extent sulfur and oxygen. It is larger than the planet Mars and represents approximately 15% of the volume of the Earth.

Many data about the Earth’s core have been obtained by specialists after carrying out various analyzes on igneous rocks, since these undergo a solidification process after being expelled outside the Earth and cooling slowly.

In fact, scientists have discovered that the Earth’s core has been slowly forming. This began to solidify approximately one or two million years ago, that is, approximately three billion years ago the Earth had a liquid core.

See also Rock Cycle.

Composition of the Earth’s core

The Earth’s core is made up of two cores, one external and one internal.

External nucleus

It is located above the inner core, almost three thousand kilometers away from the Earth’s surface. It is a liquid composed of iron and nickel in the form of an alloy, whose thickness reaches approximately 2,300 kilometers.

This core has a temperature close to 5,000 degrees Celsius, however, it is not high enough to solidify the liquid that composes it.

Scientists believe that this nucleus is the cause of various terrestrial magnetic and electrical phenomena.

inner core

It is the hottest place on Earth, temperatures range between 5,000 and 7,000 degrees Celsius.

It is composed of solid iron; However, it withstands both high temperatures and pressure and does not melt. It has an approximate radius of 1,200 kilometers.

This nucleus was discovered in 1936 by the Danish seismologist Inge Lehmann. Scientists, after various analyzes and calculations, have determined that the inner core has a rotation movement and that it is one degree faster than the rotation of the surface.

See also Nucleus.

Features of the Earth’s core

Among the main characteristics of the core of planet Earth the following can be mentioned:

It is the deepest and hottest part of the Earth. It has formed slowly, compared to the other layers of the Earth. Its size exceeds that of the planet Mars. It has two cores, one external (liquid) and one internal (solid). It is composed mainly of iron and nickel. It affects and intervenes in the various terrestrial magnetic phenomena.

See also Earth.

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