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Which factor should remain the same in a fair comparison of ice melting?

Answer and explanation

Correct answer: Initial size of ice pieces

The direct answer is C: the initial size of the ice pieces. A fair comparison changes only the factor being tested, such as environmental temperature, while starting with equivalent ice pieces. If one piece is larger, it contains more ice and may naturally take longer to melt, so size could explain the result. Thus initial size is a controlled variable. A may be the independent variable if temperature is being tested, so it should change rather than remain the same. B, melting time, is normally the dependent variable being measured. D is a conclusion, not an experimental variable. Memory cue: keep starting materials alike before comparing results.

Related tags

Ice-SizeControlled-VariableMeltingVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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