Some mixtures have ____ different substances dissolved in a liquid. ____ can help us separate them out, so that we know what substances are present. ____ of the mixtures we want to study are placed along a line drawn in pencil on some special absorbent ____. The end of the paper is dipped into a ____. As the solvent moves up the paper, it ____ the mixtures. As all the ____ in the mixtures move up the paper at different speeds, they become separated. Eventually each solute comes out of ____ at a different point. We can ____ the solute “spots” with the position of spots made by pure materials, and so work out what is in each mixture.

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