The Earth is comprised of many diverse elements, including metals and minerals, sedimentary and molten rocks and water. The Earth is made of two distinct regions, which are the core and the surrounding atmosphere. The atmosphere contains mostly gaseous substances and liquids, while the crust contains solid elements such as rocks, dirt, soil and magmas.
The Earth was formed from the inside out, beginning with the core, which was then surrounded by a dense mantle and finished with a solid crust. Then, the atmosphere and hydrosphere formed through the release of gases and liquid particles from the surface. The atmosphere and hydrosphere, along with the body of the Earth, formed during a long period of time. These regions contain several different gases, including oxygen, hydrogen and carbon. These substances were initially produced during repetitive volcanic activities from within the core, and continue to be produced from the Earth's core in this manner. In addition to these primary gases, volcanic eruptions produce water, carbon dioxide, sulfur dioxide and nitrogen, which also accumulate in the atmosphere. The dense body of the Earth contains a hot core made of an assortment of metals as well as a mantle comprised primarily of silicate. The surface, or crust, varies in composition depending on region on geography, and may be covered with water or thick soils.