www.whyville.net Mar 6, 2004 Weekly Issue



hottiemb
Times Writer

Yeast: How Does It Really Work?

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Hey guys, this is hottiemb with a science article for a change! =D

The other day my science teacher was talking to us about yeast and how it makes bread and other baked goods rise. It's quite interesting and you'd never believe the process! =)

I'm going to start off by giving you an example. The other day, someone I know was making her grandmother's bread recipe. She was watching her weight, so instead of putting in two cups of sugar, like the recipe said, she decided to lower it to half a cup. When the bread didn't rise, she couldn't figure it out. She did everything right, and how could sugar not make the bread rise?

As you may or may not know, yeast is a living thing. All living things have to eat. The way yeast makes the bread rise in that recipe is by feasting on the sugar -- it then lets off carbon dioxide, or passes gas, as some people might think of it (LoL). The carbon dioxide pushes up on the bread, making it rise and expand. Then the yeast soon dies from the heat of the oven.

So, if you add too much sugar, the yeast will eat too much and let off too much carbon dioxide, resulting in your bread rising too much. If you don't put enough sugar in, the yeast will not eat enough or let off enough carbon dioxide and your bread won't rise like it should.

Hey! I told you you'd never believe it, but it is true! I hope you all have learned something from my article. I know I was in shock when I heard this, too!

Sorry Editor, my only source was my teacher, but you can probably find some cool sites on the web about it also! =)

This is hottiemb, signing off.

 

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