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A student changes the amount of sugar in water and measures the density of the solution. What type of variable is solution density?

Answer and explanation

Correct answer: Dependent variable

The independent variable is the factor deliberately changed, and the dependent variable is the result measured in response. A controlled variable is kept unchanged so that it does not confuse the comparison. This distinction is useful whenever an experiment asks whether one quantity affects another: the changed quantity is the possible cause and the measured quantity is the possible effect.

The student changes the amount of sugar added to water. That amount is therefore the independent variable. The density of the resulting solution is measured to see whether it changes with sugar quantity, so solution density is the dependent variable. Water volume, temperature, and other relevant conditions should be controlled. Hence option D is correct.

Related tags

ScienceDependent-VariableDensitySugar-SolutionVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceClass 9 Mcq

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