What is the independ ent variable in this experiment? The salt concentration inside the bag. The salt concentration in the beaker. The type of bag used. The amount of time the experiment runs.

In an experiment, the independent variable is the factor that is manipulated or changed by the researcher to observe its effect on the dependent variable. In this case, the independent variable is the "salt concentration in the beaker" because it is the factor that can be controlled or changed by the researcher to see how it affects the salt concentration inside the bag, which would be the dependent variable. The type of bag used and the amount of time the experiment runs are not independent variables; they are controlled variables that are kept constant to ensure that the effect of the independent variable can be accurately observed.