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In an experiment all plants receive the same amount of water. What type of variable is the amount of water?

Answer and explanation

Correct answer: Controlled variable

Direct answer: Option C, controlled variable, is the correct type. A controlled variable is a condition deliberately kept the same so that it does not confuse the comparison. Since every plant receives the same amount of water, water amount is controlled. The independent variable is the factor the investigator changes, such as fertiliser amount; the dependent variable is the measured response, such as plant height or number of leaves. Option A is wrong because water was not changed between groups. Option B is wrong because water amount is not the result being measured in the stated situation. Option C is correct because it is held constant. Option D is wrong because a conclusion is an interpretation of evidence, not a variable. Memory cue: changed = independent, measured = dependent, kept same = controlled.

Related tags

Controlled-VariableWaterPlant-ExperimentHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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