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How should the amount of sugar be kept in a dissolving experiment?

Answer and explanation

Correct answer: The same in every trial

The governing concept is control of variables. If an investigation compares the effect of temperature on dissolving, the amount of sugar must remain the same in every trial. This makes sugar quantity a controlled variable and ensures that a difference in dissolving time or amount dissolved can be attributed more fairly to temperature. Option C is correct. Changing the sugar amount would introduce another factor and make the comparison unfair. Guessing or using no measurement reduces reliability because the trials may not actually contain equal quantities. Other conditions, such as water volume and stirring, should also be kept constant when they are not being tested.

Related tags

Controlled-VariableSugarDissolvingExperimental-FairnessVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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