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Maria is preparing an experiment using three cups, one made of paper, one of plastic, and one of glass. She plans on pouring 50 ml of hot water into each of the three cups and recording the temperatures in 5 minute intervals. What is the independent variable in this investigation?

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    Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you.

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