The layers of the earth are the atmosphere, hydrosphere, and lithosphere. The atmosphere provides nitrogen, oxygen, neon, and argon and surrounds the earth. The hydrosphere contains water and some dissolved minerals. The lithosphere is the solid part of the earth and provides the greatest variety of chemical resources. In the lithosphere there is the crust, mantle, and core. An ore is a rock or mineral that can be mined and profitable to extract a metal or other material. A deposit is a naturally occurring collection of ores in the lithosphere. A mineral is a naturally occurring solid that contains the element of interest.
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