NCEA L1 Science Practice Questions - NCEA Level 1 Science - New Zealand Exam

Why is it essential to keep controlled variables constant during a scientific experiment?

To ensure that any observed changes in the dependent variable are caused solely by the independent variable To increase the speed at which the chemical reaction or biological process occurs To guarantee that the experiment yields the exact results predicted by the hypothesis To eliminate the need for repeating trials and calculating average values

Correct Answer:

To ensure that any observed changes in the dependent variable are caused solely by the independent variable

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