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Why should the initial temperature be kept the same in a food-heating experiment?

Answer and explanation

Correct answer: So final temperatures can be compared fairly

A fair heating experiment must begin from the same starting condition when final temperatures are compared. If one food sample starts warmer than another, it may reach a higher final temperature simply because it had an initial advantage. Equal initial temperatures ensure that differences in the final readings are more likely to be related to the factor being investigated, such as heating method or duration.

Option B is correct because keeping the starting temperature the same allows a fair comparison of final temperatures. It does not mean that the food type can change freely, remove the need for a container, or automatically make heating time the dependent variable. Other relevant conditions should also be controlled. The central principle is to hold the baseline constant so that the observed difference can be interpreted properly.

Related tags

Initial-TemperatureControlled-VariableHeatingVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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