native - a metal found unreacted in the earth's crust., ore - a rock containing enough metal or metal compound for it to be economically viable to extract, iron oxide - a compound found in an iron ore., reactivity series - A list of metals in order of their reactivity, extraction - getting something out of something, mining - digging down into the ground using tunnels to get something out of the ground., oxidation - when an element combines with oxygen, reduction - when a metal oxide ore has its oxygen taken away., electolysis - A costly process which uses electricity to separate a compound.,
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C1 3.2 Revision of key words ores
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