[ 1 syll. jac(k), ja-ck ] The baby boy name Jack is also used as a girl name, but it is much more common for boys. Its pronunciation is JHAHK â . Jack is largely used in the English and Dutch languages, and its origin is English and Hebrew.
The control variable strongly influences experimental results, and it is held constant during the experiment in order to test the relative relationship of the dependent and independent variables. The control variable itself is not of primary interest to the experimenter.
The other variables are called controlled variables because the experiment is designed to keep them at an unchanging value, known as controlling a variable. A valid experiment should have only one independent variable. Purpose of an Independent Variable An experiment attempts to trace the causal relationship between two factors in a natural process, such as the effect temperature has on the rate of a certain chemical reaction.