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Flotation
Air and chemicals create froth that carries the wanted material to the top so it can be skimmed off.
Extraction
A solvent is added that dissolves one part of the mixture but not the other.
Fractional Distillation
A liquid mixture is heated so different liquids boil at different temperatures and separate.
Crystallization
A dissolved solid is separated from a solution by cooling or concentrating it so crystals form.
Chromatography
A mixture separates because its components move through paper or another porous material at different speeds.