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Planet Earth was formed approximately 4,5 billion years ago through impacts and collisions with other stars. This collision was responsible for the formation of the Moon. Initially, the Earth was enveloped in gas and with intense volcanic activity. With the cooling process, the earth's crust was formed, allowing the presence of liquid water, and the formation of the oceans. It is the only planet in the Solar System not named after a god. It is the third closest to the Sun, the densest and the fifth largest of the eight planets in the Solar System. Its internal structure is constituted by the crust, the rocky portion; by the mantle, formed by magma; and by the core, divided into outer core and inner core. In its external portion, it presents the lithosphere, rocky sphere; the atmosphere, gaseous sphere; the hydrosphere, sphere of water; and the biosphere, sphere of life.
