Chemistry is the study of the behavior and composition of matter. Al1 foods are made up of chemical substance which undergoes chemical changes when cooking in an oven or (1) digested within the body. The cooking of meat and vegetables induce chemical changes, making it more delicious; similarly (2) the leaving action of baking powder is a straightforward chemical change, as is the conversion of starch into sweet sugars by digestion. Cookery is a science requiring (3) for knowledge of chemistry. This is evident from the variety (4) of cooking products and food additives available as cooking (5) oils, fats, colorings, sweeteners, tenderizers, flavorings, screaming agents, preservatives, etc. Each is carefully prepared before painstaking research. It is therefore essential (6) for trained cookers to understand chemical science in order to (7) appreciate the chemistry nature of foods and the changes (8) achieving on cooking. Homeworkers should also know (9) cleansing agents and textiles used in the home and how (10) the latter responds to the effects of heat, light, water, and chemical cleansing agents.