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these are the materials that we need for the experiment:

We have 2 bottles A and B.
First,we put yeast and water to bottle A while bottle B have sugar,water and yeast.
Second,we put a balloon on top of each bottle.
After how many minutes,we check on the balloon,the balloon on bottle B was bigger in length than bottle A because we measure it with a ruler.
Then,we do it for many times and as a result,the balloon on bottle B is bigger.
The balloon on bottle B inflates bigger because it has sugar in it,the sugar is like the energy.