Advanced Science Primary 3 Diversity

Jun Jie added yeast to dough to bake bread. After an hour, the dough doubled in size. This happened because the yeast __________.

A is a living thing that grew bigger
B is a non-living thing that absorbed water
C produced carbon dioxide gas
D produced oxygen for the dough
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Worked Solution

Step 1: Yeast is a fungus used in baking. Step 2: When it feeds on sugar/flour, it produces carbon dioxide gas. Step 3: The gas gets trapped in the dough, causing it to rise.

Correct answer: produced carbon dioxide gas

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