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Project Summary
| Difficulty | 4 |
| Time required | Average (about one week) |
| Prerequisites | None |
| Material Availability | Readily available |
| Cost | Low ($20 - $50) |
| Safety | Use caution when working with a stovetop. Adult supervision is recommended. |
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| * Note: This is an abbreviated project idea, without notes to start your background research or a procedure for how to do the experiment. You can identify abbreviated project ideas by the asterisk at the end of the title. If you want a project idea with full instructions, please pick one without an asterisk. |
Abstract
Yogurt is a very versatile dairy product. It's yummy eaten straight from the container, it is good for your digestive system, and it can be used in several ways for cooking. There is historical evidence that yogurt-making developed 4,500 years ago! Humans depended on yogurt-making as a way to preserve milk. Yogurt is the result of bacterial fermentation of milk. In fermentation, the bacteria consume the milk sugar, lactose, and produce lactic acid. The end-product is a thick, creamy, and tangy food product. But what conditions produce the creamiest yogurt? Is it the temperature at which the yogurt culture is added to the warm milk? Is it the fermentation time or temperature? In this cooking and food science fair project, investigate these factors and see which conditions produce the best yogurt. Instructions on how to make yogurt can be found in the first bibliographic reference. Remember to vary only one condition at a time so you know which condition has the greatest effect on the yogurt.Bibliography
This website gives explicit directions on how to make homemade yogurt.
- Reeps, M. (n.d.). How To Make Your Own Yogurt. Retrieved October 8, 2008, from http://www.makeyourownyogurt.com/yogurt.php?step=0
- Wikipedia Contributors. (2008, October 8). Yoghurt. Wikipedia: The Free Encyclopedia. Retrieved October 8, 2008, from http://en.wikipedia.org/w/index.php?title=Yoghurt&oldid=244002002
Variations
- For more science project ideas in this area of science, see Cooking & Food Science Project Ideas.
Last edit date: 2008-10-16 12:00:00
Career Focus
If you like this project, you might enjoy exploring careers in Cooking & Food Science.
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Food Science Technician Good taste, texture, quality, and safety are all very important in the food industry. Food science technicians test and catalog the physical and chemical properties of food to help ensure these aspects. |
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Food Scientist or Technologist There is a fraction of the world's population that doesn't have enough to eat or doesn't have access to food that is nutritionally rich. Food scientists or technologists work to find new sources of food that have the right nutrition levels and that are safe for human consumption. In fact, our nation's food supply depends on food scientists and technologists that test and develop foods that meet and exceed government food safety standards. If you are interested in combining biology, chemistry, and the knowledge that you are helping people, then a career as a food scientist or technologist could be a great choice for you! | |
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Dietitian or Nutritionist Ever wondered who plans the school lunch, food for patients at a hospital, or the meals for athletes at the Olympics? The answer is dietitians and nutritionists! A dietitian or nutritionist's job is to supervise the planning and preparation of meals to ensure that people—like students, patients, and athletes—are getting the right foods to make them as healthy and as strong as possible. Some dietitians and nutritionists also work to educate people about good food choices so they can cook and eat their own healthy meals. | |||
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