___________________are separated from their ores before they can be use
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The rocks are full of valuable minerals. They also contain rock that isn't valuable, which is called waste rock. The valuable minerals must be separated from the waste rock. Enormous trucks haul rock containing ore from a mine site to where the rock is processed.
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An ore is a rock that contains enough of a metal or a metal compound to make extracting the metal worthwhile. Most metals are extracted from ores found in the Earth's crust. Ores are often metal oxides , although sulfide and carbonate ores are also common.
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