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A student measures the melting time of wax at different temperatures. What type of variable is temperature?

Answer and explanation

Correct answer: Independent variable

The direct answer is A: independent variable. The student measures wax melting time at different temperatures. Temperature is intentionally changed from one trial to another, so it is the independent variable. The melting time responds to that change and is therefore the dependent variable, not listed as the answer here. A controlled variable would be kept the same, such as the mass or type of wax, container, or starting conditions. A constant is simply something that does not change during the test; temperature does change. B is the measured effect, C means kept equal, and D means unchanged. Memory cue: the input changed by the investigator is independent; the output measured is dependent.

Related tags

TemperatureIndependent-VariableWax-MeltingVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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