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Hakeem is testing the effects of sunlight on samples of soil. Which of these actions would introduce confounding variables into Hakeem’s experiment? (THIS IS MULTIBLE CHOICE QUESTION)
a.He tests a theory that’s already been established.
b.He tests multiple hypotheses at a time.
c.He uses identical specimens when completing multiple trials.
d.He adjusts the independent variable and records the effects.
e.He uses different types of soil in each of his samples.

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gigi1103
He tests multiple hypotheses at a time.


He uses different types of soil in each of his samples.


hope i helped :)
mansoorahmedd67

b.He tests multiple hypotheses at a time.

e.He uses different types of soil in each of his samples.


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