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 balloon inflated
the balloon inflated
the yeast mixed with sugar
the yeast mixed with sugar
the hot water warmed the bottle
1 answer
The most appropriate response to indicate that a chemical change occurred in the experiment is "the balloon inflated."
This indicates that a gas was produced as a result of the reaction between the yeast and sugar, which is a sign of a chemical change.
4 answers
1 answer
1 answer
1 answer