Ideally, these variables won't impact the final conclusion drawn by the experiment, but they may introduce error into scientific results. Extraneous Variables: Extraneous variables are "extra" variables that may influence the outcome of an experiment but aren't taken into account during measurement.Controlled Variable: A controlled variable or constant variable is a variable that does not change during an experiment.Įxample: In the experiment measuring the effect of temperature on solubility, controlled variable could include the source of water used in the experiment, the size and type of containers used to mix chemicals, and the amount of mixing time allowed for each solution.The dependent variable gets its name because it is the factor that is dependent on the state of the independent variable.Įxample: In the experiment measuring the effect of temperature on solubility, solubility would be the dependent variable. Dependent Variable: The dependent variable is the variable that you measure or observe. ![]() Independent Variable: The independent variable is the one condition that you change in an experiment.Įxample: In an experiment measuring the effect of temperature on solubility, the independent variable is temperature.
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