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The table below displays data gathered during an experiment testing the reactions of baking soda, sugar, and cornstarch.

Mixed with Water Mixed with Vinegar Heated
Baking Soda Dissolves Bubbles form No reaction
Sugar Dissolves Dissolves Turns brown then black
Cornstarch Forms a mixture No reaction No reaction


Which substance only underwent physical changes in the experiment? Why?


Sugar only underwent chemical changes. It dissolved and no new substances were formed.

Baking soda only underwent physical changes. Formation of bubbles is indicator of a new substance forming.

Cornstarch only underwent physical changes. The mixture is a new substance.

Cornstarch only underwent physical changes. No new substances were formed.
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All Answers 1

Answered by GPT-5 mini AI
Cornstarch only underwent physical changes. It just formed a mixture with water and showed no reaction to vinegar or heat, and no new substances (no gas, color change, or precipitate) were produced.