The Earth has a heat source that provides energy and conditions a set of movements inside the Earth that take place on its surface, or lithosphere.
The average radius of the planet is 6,370 km.
The Earth's crust is the surface layer, cold and thin compared to the others. Approximately 70 km deep from the surface, it is subdivided into two layers: the sial, the outermost layer, ranging from 15 km to 25 km.
And the sima, which lies beneath the first and has a thickness between 30 km and 35 km.
In the crust occurs the phenomena that form minerals, rocks, and soils. And landforms are manifested. For this reason, the crust is of extreme importance for nature as a whole and society, as it contains all the mineral raw materials essential for economic activities such as industry and agriculture.
The mantle has a viscous, fluid behavior, moving very slowly. Formed by an unsolidified material - magma - it constitutes almost 68% of the planet's mass. Its average thickness is approximately 4,600 km, and its temperature reaches 4,000 °C. In the upper part of the mantle, the asthenosphere is more malleable and shows movements. The tectonic plates that form the lithosphere can be found here.
The core is in the center of the planet. It's also called the nife. With high density because of its metallic composition (nickel and iron), it is 1 700 km thick and reaches a temperature of 6 000 °C. It is divided into an outer core - liquid and with the occurrence of a convective and inner core, solid.