Experimenting milk

        Mia is big on milk; she's an active 12 year old kid and goes through a gallon of regular whole milk in about a week. Her brother, Peter, is in high school and thinks he knows everything. He doesn't drink a lot of milk, but he's heard that organic milk is better for building muscle and bone, so that is the only kind he'll drink. Mia is surprised that Peter's milk doesn't go bad in the carton as uickly as hers, and sometimes lasts as long as three weeks, whereas her regular milk goes bad in about 10 days. She decides to conduct an experiment where she buys different brands of milk, including organic milk, milk from the local dairy, and store-brand milk purchased at the supermarket. She pays her brother Peter to taste a sample of each one after 15 days and records his comments about the freshness of each. Identify the following: 1. Hypothesis: 2. Predicted results: 3. Dependent variable: 4. Independent variable: 5. Control variable: