Core of the Earth Meaning
What is the Core of the Earth:
The core of the Earth is the deepest and hottest layer on the planet, it is solid and spherical in shape.
The Earth is made up of three important layers called the geosphere (solid), hydrosphere (made up of salty or sweet liquids in a gaseous or solid state) and the atmosphere (made up of various gases).
Now, the core of the Earth 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 on the core of the Earth have been obtained by specialists after performing various analyzes on igneous rocks, since they undergo a solidification process after being expelled outside the Earth and slowly cooling.
In fact, scientists have discovered that the core of the Earth has been slowly forming. It 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 Cycle of the rocks.
Composition of the Earth's core
The Earth's core is made up of two nuclei, one outer and one inner.
It is located on the inner core, almost three thousand kilometers from the earth's surface. It is a liquid composed of iron and nickel in the form of an alloy, whose thickness reaches 2,300 kilometers, approximately.
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.
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 rotational motion and that it is one degree faster than the rotation of the surface.
See also Core.
Characteristics 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, with respect to the other layers of the Earth.
- Its size exceeds that of the planet Mars.
- It has two nuclei, 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.