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if you change more than one variable, you will not know which one has had an effect on the experiment. If the outcome changes when one variable is altered, then the change can only be due to the one variable, by logical deduction.

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9y ago

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How many variable should be tested and isolated in a good experiment?

One. If there is only one variable being tested, when you compare it to the control, you know that was the cause of a change.


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A variable that doesn't change in an experiment is called a constant. Constants are used to ensure that only one variable is being tested for its effect on the outcome of the experiment.


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It would not be a fair test if there were 2 or 3


What dose variable mean in science?

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A controlled experiment. In a controlled experiment, one variable (independent variable) is changed or manipulated while all other variables are kept constant to observe the effect on the dependent variable. This allows researchers to determine the specific impact of the variable being tested.


What is an experiment in which only one variable the manipulated variable is changed at a time is called an?

An experiment in which only one variable, the manipulated variable, is changed at a time is called a controlled experiment. This approach allows researchers to isolate the effects of the manipulated variable on the dependent variable, ensuring that any observed changes can be attributed directly to the variable being tested. By keeping all other variables constant, the reliability and validity of the results are enhanced.


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To ensure that an experiment is testing only one variable scientists often run a?

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