You can determine that a chemical change occurred in the experiment because the balloon inflated. This inflation indicates that a gas (carbon dioxide) was produced as a result of the yeast metabolizing the sugar, which is a chemical reaction. The other options, such as the yeast mixing with sugar or the hot water warming the bottle, do not indicate a chemical change.
Use the experiment described to answer the question. You will conduct an experiment at home. Use the following materials: Clear plastic bottle 150 mL of hot water Yeast Sugar Balloon Teaspoon Follow these directions: Start by pouring three teaspoons of yeast and two teaspoons of sugar into the plastic bottle. Then slowly pour the hot water into the bottle. Stretch the opening of the balloon, and place it over the bottle’s opening. Wait approximately 30 minutes. Observe the balloon inflating as the liquid starts to foam. How do you know that a chemical change occurred in the experiment? (1 point) Responses the yeast mixed with sugar the yeast mixed with sugar the balloon inflated the balloon inflated the hot water warmed the bottle the hot water warmed the bottle the balloon was stretched over the bottle the balloon was stretched over the bottle Skip to navigation
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