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starch


a large sugar molecule

Marshmallows contain starch molecules.

  starch

gelatin


a protein obtained by boiling animal tissues

Gelatin molds jiggle when you shake them because they are flexible.

gelatin

enzyme


a chemical that causes a chemical reaction to occur

Food scientists sometimes add an enzyme to solid candy so that it turns into a liquid.

enzyme

mixture


a combination of different ingredients

Cookie dough is a mixture of ingredients, like flour, sugar, and eggs.

  mixture

evaporates


changes from a liquid into a gas

Water in a pot evaporates when it’s heated.

evaporates

concentration


the amount of an ingredient in relation to that of others in a mixture

A high concentration of sugar in lollipops makes them a hard candy.

concentration
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