Because otherwise it will not be possible to know whether observed variations in the dependent variable are due to one independent variable or another.
egg expiriment
control variables: the things that are not changing.Independent variables: the things that you change.Dependent variables: the things that are changed due to the independent variable
In a controlled experiment, the Independent variable refers to the variable that is manipulated or altered. The dependent variable, meanwhile, is the result of the experiment.
the three kinds of variables are independent,dependent and controlled
Every time the independent variables change, the dependent variables change.Dependent variables cannot change if the independent variables didn't change.
egg expiriment
Expirimental Variables The part of your expiriment that does not change.
control variables: the things that are not changing.Independent variables: the things that you change.Dependent variables: the things that are changed due to the independent variable
Dependent, Independent and Controlled
independent variable can be controlled by manipulation or selection.
two
independent, dependent, controlled
In a controlled experiment, the Independent variable refers to the variable that is manipulated or altered. The dependent variable, meanwhile, is the result of the experiment.
Ball sack
the things you change
controlled variable, dependent variable and independent variable
The independent variable in an controlled experiment is what you are changing