Respuesta :
Two control/fixed variables are temperature and amount of light.
Any variable in a research project that is kept constant is referred to be a control variable. Despite not being a study-relevant variable, it is controlled anyway because it might have an impact on the results. One typical class of controlled variable is temperature. A temperature is controlled if it remains the same during an experiment. Other examples of controlled variables are the intensity of the light, the use of the same kind of glassware, a constant humidity level, and the length of the experiment.
A scientist should make an effort to hold all fixed variables besides the independent variable because there are many control variables in every particular experiment. The correlation between the dependent and independent variables may be invalidated if a control variable changes throughout an experiment.
To know more about control variables refer to: https://brainly.com/question/9801257
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