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While studying water temperature over time in sunlight, which factor can be kept controlled?

Answer and explanation

Correct answer: Size of container

A controlled variable is a condition that is kept the same while the independent variable is changed and the dependent variable is measured. Keeping such conditions constant makes the comparison fair. In this investigation, the purpose is to observe how water temperature changes with time while the container is placed in sunlight.

The time in sunlight is the factor being varied or observed, and water temperature is the measured dependent quantity. Change in temperature is also part of the result, not a controlled condition. The container size can be kept identical for every trial, so it is a controlled variable. Therefore, option C is correct. If container sizes differed, they could affect heating and make it difficult to attribute the temperature change only to time.

Related tags

ScienceControlled-VariableTemperatureSunlightVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceClass 9 Mcq

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