EKI year 4: Experiment with yeast

In this first unit of the 4th grade  the pupils are working on food and food waste.
Today in English class, we learnt that yeast is a microorganism and that when mixed with sugar it releases a gas called carbon dioxide that makes the balloon bigger.
We also learnt that the same microorganism is used in bread as a raising agent, to double its size.

Here below some pictures of the experiment:















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