My B1 Speaking/Writing class combined with Christine’s B1 Speaking/Writing class to do an experiment with yeast as part of their bread project. We were investigating what the best food is for yeast and the affects of salt on yeast growth. This little experiment is really simple. You just combine yeast and sugar with some warm water in a plastic zipper bag. Observe it to see how much gas (carbon dioxide) is produced. Do the same with a combination of yeast and flour, yeast, sugar and salt, and yeast, flour and salt.
B1 Speaking/Writing Class
What Yeast Eats
To see what is the best food for yeast
Sugar is the best food for yeast
Put sugar, yeast and water in the first bag. Put flour, yeast and water in the second bag. Put sugar, yeast, salt and water in the third bag. Put flour, yeast, salt and water in the fourth bag. Mix the contents of the bag well. Put the bags in a warm place for about one hour.
The bag with sugar, yeast and water produced the most gas. The bag with the flour, yeast, salt and water produced the least gas.
Sugar is the best food for yeast. Yeast can eat flour, but it is not a very good food. Salt stops yeast from eating food.
And here are their completed posters…
Christine’s Class: Eric, Eddie, Joe, Flora and Mary
Kathryn’s Class: Sean, Kitty and Lizzy