A group of students conducts an experiment to test the amount of sugar that can be dissolved in water at 50°F, 100°F, and 200°F.Which suggestion will help increase confidence in the results?

Repeating an experiment independently helps show whether the results are consistent rather than due to one person’s technique or a measurement error. If each student tests how much sugar dissolves at the three temperatures and they compare results, confidence in the findings increases. Timing additions or testing salt does not directly check whether the sugar results are repeatable, and a hand cannot measure water temperature accurately.

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