Examlex
Holding the width of a confidence interval fixed,increasing the level of confidence can be achieved with a lower sample size.
Subsurface Mining
Extraction of minerals and resources from below Earth's surface, involving techniques that may harm the environment through alteration of land structure and pollution.
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.
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