Advanced Placement (AP), 22.04.2020 22:02 yangyang7

Scientists want to examine the effects of a coal-burning power plant on the pH of a lake that is downwind of the power plant. They take samples from a lake that is not downwind of the power plant to serve as a control. However, they did not realize that the lake they chose as a control group was a geothermal hot spring with acidic water.

Which of the following best describes how their choice of control group could affect the results of their experiment?

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Scientists want to examine the effects of a coal-burning power plant on the pH of a lake that is dow...