Our planet (the nucleus) is a huge sphere of metallic material that has a radius of approximately 3,485 km, that is, a size similar to the planet Mars. The density varies, from about 9 on the outer edge to 12 on the inner side. It is composed primarily of iron and nickel, with aggregates of copper, oxygen, and sulfur.
This formed along with this about five billion years ago after a supernova explosion. The leftover heavy metals clumped together into a disk, spinning around the sun.
The core composed mainly of iron and other radioactive elements such as uranium and plutonium released heat and then, by gravity, the heavier materials sank into the center and the lighter floated to the crust. Such a process is known as planetary differentiation. And for this fact is that the core of the earth is composed of iron, nickel, iridium, among others, which are as we said heavy materials.
It is important to mention that when our planet was burning, the metals that today make up its core suffered an alloy that became a very dense and strong structure and, for that matter, planet Earth is the densest in our system.
The inner core has a radius of 1,220 km. It is believed to be solid and has a temperature between 4,000 and 5,000 ° C. It is possible that the inner core is the result of crystallization of what was a larger liquid mass and that this growth process continues. Its thermal energy influences the mantle, particularly in convection currents. The inner core is currently considered to have a rotational motion and may be reduced at the expense of the outer.
Many scientists believe that 4 billion years ago the Earth already had a magnetic field caused by a metallic core. His training marked the boundary between the consolidation process and the cooling of the surface.
The Core of the Earth is vital for our species and for life in general; and is that if the Core of the Earth did not exist, definitely our planet would not have any opportunity to host life. The main reason is that thanks to this core, what is known as terrestrial magnetic current is generated, something that is essential for our planet to be habitable.
It is important to highlight the importance of the function of the Earth's Core since without it; our magnetic field would not be strong enough to protect us from the burning rays of the sun; and it is that the magnetic field is responsible for slowing down the solar wind, causing most of the particles to collide with our planet and disperse.
