Milk provides both energy and essential body-building compounds. Milk is an all-round food stuff and helps give a balanced diet. You should know about the nutrients in milk. You need to give food which contains these substances especially for infants and young children. The freezing point of milk is not dependent on fat and protein content.
Salt is the decisive factor together with lactose.
These substances are completely dissolved. Deviation from this show that the composition of the milk is abnormal and that probably been adulterated. The specific gravity depends on the protein and fat content. If the milk is mixed with air, by pumping for example, the specific gravity will be lower. 9 Fresh milk is a liquid .