MAKE PLASTIC MILK

One cup of milk 4 teaspoons of white vinegar A bowl A strainer Adult help Ask your friendly adult to heat up the milk until it is hot. Now ask the adult to carefully pour the milk into the bowl Add the vinegar to the milk and stir it with a spoon for a minute Now the fun part, pour the milk through the strainer into sink. When it is cool enough, you can rinse the blobs off in water            while you press them together . Now just mold it into a shape and it will harden in a few days. Plastic? In milk? Well, sort of. You made a substance called CASEIN.  It's from the latin word meaning "cheese." CasEin occurs when the  protien in the milk meets the acid in the vinegar. The casein in milk  does not mix with the acid and so it forms blobs. True plastics, called  polymers, are a little different. If you want to make a true plastic and  learn more about polymers, try the Homemade Slime experiment. The project above is a DEMONSTRATION. To make it a true  experiment, you can try to answer these questions: 1. Will more vinegar make more casein? 2. Will you get the same results with low-fat milk, soy milk? 3. Do all types of vinegar work? 4. Will other acids, such as lemon juice and orange juice work?