A scientist wants to perform a controlled experiment to test the effect of rust on chemically treated iron. which action would be most important to perform in a controlled experiment? design an experiment that is based on previously published results. expose the treated iron to the corrosive effects of the air. test a large piece of treated iron and a small piece of untreated iron. test a piece of treated iron and a piece of untreated iron under the same conditions.

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5 June, 09:15

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Perry · Answer 1

The most reasonable answer is D saying that is really the only controlled experiment out of the bunch.

Shyla Chambers · Answer 2

Test a piece of treated iron and a piece of untreated iron under the same conditions.