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If a student changes the amount of water and measures plant height what is the dependent variable?

Answer and explanation

Correct answer: Plant height

A dependent variable is the result that is measured to find out what happened in an experiment. In this investigation, the student changes the amount of water and then measures plant height. Therefore, plant height is the dependent variable. The amount of water is the independent variable because it is the factor deliberately changed to study its possible effect on growth.

Option B is correct because it identifies the measured outcome. Pot colour and the name of the soil are not the result being tested. Soil conditions might matter in a real experiment, but they should be kept controlled if they are not the chosen variable. The important rule is to ask, “What was changed?” for the independent variable and “What was measured?” for the dependent variable.

Related tags

Plant HeightDependent VariableMeasurementHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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