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Burping Bread
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Burping Bread

Credit: Robert Lopez
Source: CK-12 Foundation
License: CC BY-NC 3.0

It’s the foundation of every sandwich. For some people, a sandwich is just a reason to eat it. The average American eats more than 60 pounds of bread a year!

The Back Story

  • Bread is special. There’s no doubt about it. People have been eating it for thousands of years. Bread has a deeper meaning besides just being a source of dietary carbohydrates. When people “break bread” together, they share fellowship as well as food.
  • Credit: ella
    Source: https://www.flickr.com/photos/cookylida/3758677784/
    License: CC BY-NC 3.0

    Yeast causes the doe to rise and expand [Figure2]

     

  • So what makes bread special? What makes starchy flour and water become a fluffy loaf of bread instead of a flat thin cracker? Chemistry explains it.
  • Watch this video to learn the chemistry behind your favorite loaf: http://www.nbclearn.com/chemistrynow/cuecard/52355

Can You Apply It?

With the links below, learn more about the chemistry of bread. Then answer the following questions.

  1. What is gluten? Why is it important in bread?
  2. What is yeast? What role does it play in bread?
  3. What happens to the yeast when the bread bakes?
  4. Besides yeast, what is another way of making bread dough rise?
  5. If you make bread dough rise without yeast, why does the loaf have to be baked immediately?

Image Attributions

  1. [1]^ Credit: Robert Lopez; Source: CK-12 Foundation; License: CC BY-NC 3.0
  2. [2]^ Credit: ella; Source: https://www.flickr.com/photos/cookylida/3758677784/; License: CC BY-NC 3.0

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