Saturday, January 16, 2010

What is the control in this experiment, and why is it necessary to have a control?

The experiment is - Which watershed has more water in the stream flowing out of the waterhed, a deforested watershed or an untouched one?What is the control in this experiment, and why is it necessary to have a control?
Untouched is the control. The purpose of a control is to know what changes as a result of the experiment.

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