A scientist wants to perform a controlled experiment to test the effect of rust on chemically treated iron. which action would b
e 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.
A test or experiment in which only one variable is changed at a time in order to verify the result is known as a controlled experiment.
That is only independent variable need to be adjusted with respect to the dependent variable.
Thus, we can conclude that the action to test a piece of treated iron and a piece of untreated iron under the same conditions would be most important to perform in a controlled experiment in the given situation.
When a syringe is inserted into the flask containing methane gas the plunger of the syringe is raise up. This led to filling of the syringe with the gas.This relate to Charles law which explain how gas expand with increase in temperature.
