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What is a metal ore?
What is the usual type of ore?
How do most metals need to be extracted from their ore?
What three things can effect the economics of metal extraction?
What two ways can a metal be extracted from its ore?
What is electrolysis?
What do some ores have to be before the metal is extracted?
What can electrolysis also be used for?
What element is used for reduction?
What happens when an ore is reduced?
What determines whether a metal can be extracted by reduction?
