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Take 100 grams of maida in a bowl, add one or two spoons of yeast powder, add some water and knead it to make dough. Keep the dough in a warm place. Observe the dough after 3 – 4 hours.

a) What changes do you observe in the dough ?

b) What might be the reason ? Discuss with your friends and write about it.

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a) We observe that the dough rises and increase its volume.

b) When yeast is added to the maida dough, the dough rises. This is due to the production of carbon dioxide gas during the process of fermentation. Bubbles of the gas fill the dough, increase its volume and make it spongy in nature.

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