| Pupils' Work

In Year 3 and 4 Stem Club this week, we explored the idea that dried yeast had the power to blow up a balloon.

Firstly we discovered that yeast is alive, just like you and me, and that it needs the same things to grow and live that we do. We gave our dried yeast warm water to wake it up and sugar to feed it, this started the process of fermentation. To prove that our yeast mixtures were alive we attached a balloon to a bottle with the mixtures inside. We watched the yeast begin to produce bubbles of carbon dioxide that slowly blew up the balloon.

It was fascinating and we were very excited to be able to demonstrate that yeast is alive and produces carbon dioxide when it ferments.