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An experiment tests the effect of water temperature on dissolving rate. The amount of sugar is also changed with temperature. What is the main problem?

Answer and explanation

Correct answer: Two independent variables are changing together

Changing both temperature and sugar amount makes the cause of the effect unclear. In a fair test change only one independent variable at a time.

Related tags

VariablesConfounding VariableDissolvingFair TestVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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