tchen careful shoppers plan meals that are nourishing as well as attractive and appetizing. They select varied foods that contain elements to encourage growth in the children of the household and continued health and vigor in the adults. Modern cooking is big business, too. Professional cooks prepare an increasing amount of the world's food in hotel and restaurant kitchens, and workers in factories process canned, packaged, and frozen foods for wide distribution.
             Cooking changes foods physically or chemically so that they become more palatable and more easily digested. The use of heat kills or inactivates disease-causing organisms and parasites in the food. Heat also retards the action of enzymes and organisms that cause food to spoil. The meaning of the word cooking is not limited to the applying of heat to foods. Foods are changed by preparing them in many different ways. They may be altered by cutting, chopping, chilling, and freezing and by mixing different foodstuffs together. Thus the word cooking defines all ways of preparing food for the table.
             People have been cooking food for untold ages probably s
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