What is the difference between independent variable, dependent variable and control variable?
The terms “dependent variable” and “independent variable” are used in similar but subtly different ways in mathematics and statistics as part of the standard terminology in those subjects. They are used to distinguish between two types of quantities being considered, separating them into those available at the start of a process and those being created by it, where the latter (dependent variables) are dependent on the former (independent variables).[ In control theory, control variables are the variables that are input to the control system. Reaction rate is the dependent variable and everything else that can change the reaction rate must be controlled (kept constant) so that you only measure the effects of concentration. Variables that need to be controlled in this case include temperature, catalyst, surface area of solids, and pressure. If not controlled, they complicate the experiment and hence, the experiment is less valid. e.g. a control variable could be time or mass. E.g. each m
