In an experiment, a scientist compares the effect of adding acid rain to samples taken from two different lakes. the scientist observes that ten drops of acid rain added to water taken from lake minnetonka in southern minnesota does not change the ph from 7.5, but ten drops of acid rain added to water taken from upper kintla lake in glacier national park causes the ph to change from 7.5 to 5.2.
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Ответ:
Independent Variable: Adding Acid Rain
Levels: Adding Acid Rain
Dependent Variable: pH value of the lakes
Results: There is a significant difference between the effects of adding acid rain to two lakes.
Ответ:
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Explanation:
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