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?

The independent variable in this investigation is the type of cup material (paper, plastic, and glass).

The independent variable in this investigation is the type of cup material (paper, plastic, and glass).

The independent variable in Maria's investigation is the type of cup material (paper, plastic, and glass). The independent variable is the one that is manipulated or changed by the experimenter. In this case, Maria is changing the type of cup material to investigate its effect on the temperature of the hot water. By using different cup materials, she is testing if the material of the cup has an impact on the temperature change over time.