Electrolysis - Chemical decomposition produced by passing an electric current through a liquid or solution containing ions, Ore - A naturally occurring solid material from which a metal or valuable mineral can be profitably extracted, Alloy - A metal made by combining two or more metallic elements, esp. to give greater strength or resistance to corrosion, reduction - The removal of oxygen by heating withh carbon, corrosion - The process of corroding metal, stone, or other materials, displacement - A more reactive metal takes the place of another in a coumpound, phytomining - the planting (and subsequent harvesting) of vegetation that will selectively concentrate specific metals from the soil into their tissues, bioleaching - The dissolution of metals from their ores by the use of microorganisms such as bacteria, smelting - Extract (metal) from its ore by a process involving heating and melting, bauxite - rock in which aluminum is found in high concentrations., density - The degree of compactness of a substance, pollution - The presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects, open-cast mines - a large quarry where a large pit is excavated on the Earth's surface to remove rock., low grade ores - Ores that have low amounts of mineral, cut off grade - The minimum grade of ore used to establish reserves., recycle - 1) Convert (waste) into reusable material,

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