The independent variable is the thing I change on purpose., The independent variable in this investigation is the number of coils on the iron core., The dependent variable is the result I record., The dependent variable in this investigation is the number of paper clips picked up., The control variables are the things I keep the same., A control variable in this investigation is the size of the paperclips., As the number of coils on the electromagnet increases more paperclips can be picked up.

Electromagnet Variables

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