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For the first six questions on this Worksheet, indicate if the variable in the described action would be independent or dependent. Remember, independent variables will be manipulated by you in an experiment, and the dependent will change based on the manipulation of the independent. Dependent variables can also be measured as a change over time. Action: Adding different amounts of fertilizer to four different aquariums.

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The action of adding different amounts of fertilizer to four different aquariums involves an independent variable, which is the amount of fertilizer. As mentioned, the independent variable is the variable manipulated by the one conducting the experiment. This is done in order to observe the effect it has on the dependent variable/s. 

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