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What effect will using a different amount of salt in every trial have on the experiment?

Answer and explanation

Correct answer: The amount of salt will affect the results and confuse the conclusion

The amount of salt can affect outcomes such as dissolving time or the concentration of a solution. If it changes in every trial, it becomes impossible to tell whether a change in the result was caused by the variable being tested or by the salt amount. Therefore, the amount of salt should be kept constant as a control variable. Exam tip: In a fair test, keep all factors that can affect the result constant except the variable being investigated.

Related tags

Variables In ExperimentsControl VariablesFair TestSalt AmountConfounding VariableVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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