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An independent variable is a variable that you can control, you can choose and manipulate this variable.

An example is an experiment looking at the growth of trees in the Dark, in a dimly lit room and in the direct sun. So you are going to put one plant in the sun, one in the dark and another in a dimly lit room.

The independent variable is the location of the experiment, because this is what is being changed.

The dependent variable may be the type of the plants and the height of the plants to begin with,

The results on which is determined by the independent variable (ie amount of sunlight on the plants)

So basically, without the independent variable you cannot really measure the full extent of the results.

Uhm, I hope that makes sense, haha.

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