Goldfish Breathing Rate & Soda

Independent Variable: This is the amount of soda added to the beakers. The independent variable is manipulated by the researchers to observe its effect on the dependent variable. Dependent Variable: This is the breathing rate of the goldfish. The change in breathing rate is measured in response to t...

Independent Variable: This is the amount of soda added to the beakers. The independent variable is manipulated by the researchers to observe its effect on the dependent variable. Dependent Variable: This is the breathing rate of the goldfish. The change in breathing rate is measured in response to the different amounts of soda added. Constants: These are the conditions that must be kept the same throughout the experiment to ensure valid results. The constants in this experiment include the size and gender of the goldfish, the initial amount of water in the beakers, the source of the water, and the environment in which the experiment is conducted (e.g., temperature, light, etc.). Control Group: This is the baseline measurement of breathing rates for the goldfish before any soda is added. It serves as a comparison to determine the effect of the independent variable. Sample Hypothesis: “If different amounts of soda are added to the beakers, then the breathing rate of the goldfish will increase with higher volumes of soda because caffeine is a stimulant that can affect metabolic rates.” Answer: Independent Variable: The amount of soda added to the beakers. Dependent Variable: The breathing rate of the goldfish. Constants: Size and gender of the goldfish, initial amount of water in the beakers, source of the water, environment of the experiment. Control Group: The baseline breathing rates of the goldfish before soda is added. Sample Hypothesis: “If different amounts of soda are added to the beakers, then the breathing rate of the goldfish will increase with higher volumes of soda because caffeine is a stimulant that can affect metabolic rates.”