Which is dependent/independent variable in science experiment?

The experiment: pieces of aluminum foil, same in amount but varying in surface area, are each submerged in a solution of copper-chloride. We are observing which piece of foil peaks in temperature fastest.



What is the dependent variable?

What is the independent variable?

What should the control variables be?Which is dependent/independent variable in science experiment?
dependent=temperature peak



independent=surface area



control=a regular piece of non altered aluminum foil

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