A Amount of water B type of insulating material Temperature of water at the beginning 1 D type of water botte E temperature of water at the end F original condition of feet with polyester socks 2 dependent (responding variable) Independent (manipulated variable control group of experiment Controlled (constant variables)

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

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