Examlex
The transfer of energy in levels through an ecosystem is called:
Longwall Mining
A method of coal mining where a long wall of coal is mined in a single slice, typically used in underground mines.
Smelting
The process of extracting a metal from its ore by using heat and a chemical reducing agent to decompose the ore, removing impurities.
Igneous Rocks
Rocks formed from the cooling and solidification of magma or lava, classified into intrusive (slow cooling inside the earth) and extrusive (quick cooling on the surface) types, such as granite and basalt.
Nonfuel Mineral Resources
Minerals found in the Earth's crust that are used for everything except fuel, such as metals, stone, and industrial minerals like gypsum and salt.
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