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In which experiment is temperature the independent variable?

Answer and explanation

Correct answer: Measuring the melting time of ice at different temperatures

The direct answer is A. Temperature is the independent variable when the experimenter deliberately changes temperature and observes its effect on another measurement. In option A, ice is placed at different temperatures, and the time needed to melt is measured. Thus temperature is changed, while melting time is the dependent variable; other conditions such as ice amount should be controlled. Option B changes ice mass but only observes colour, so mass—not temperature—is the changed factor. Option C changes container shape while temperature stays the same, so container shape is independent and temperature is controlled. Option D, comparing beauty, is subjective and does not clearly define a measurable scientific variable. Therefore A is the only option in which temperature is intentionally varied. Remember: the factor changed by the investigator is independent; the response measured is dependent.

Related tags

TemperatureIceIndependent-VariableHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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