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Q: Why do experiments usally test only one variable at time?
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How many variables can be tested at a time?

An experiment should test only one variable (the independent variable) at a time. If you are testing more than one variable at a time, you have no idea which variable is causing which effect.


What is the only variable that should be changed to test?

Independent variable


What variable is the only one that purposely changed to test a hypothesis in an experiment?

Independent variable : )


How do experiments help scientist learn about the world?

experiments test the scientist theory


Why is it important to test only one variable at a time during a experiment?

If you test only one variable then you know that the difference in the experimental and control setup is that one independent variable. If you test more than one you will not know which one made the difference.


Why is it important to test only one variable at a time during a science investigation?

If you test only one variable then you know that the difference in the experimental and control setup is that one independent variable. If you test more than one you will not know which one made the difference.


What variable is the only variable that is purposely changed to test the hypothesis?

This variable is chosen by the research team according to the experiment project.


What is test variable mean in science?

the test variable is the independent variable.


What variable is the part of the experiment that is being tested in the science method?

Dependent Variable is being tested or changed by the Independent Variable. (Wrong)The independent variable is typically the variable representing the value being manipulated or changed and the dependent variable is the observed result of the independent variable being manipulated. Experiments are usually designed to test the effect of the independent variable - so the dependent variable is NOT what it being tested.


How do you test a variable resistor?

how do test a variable resistor


Why should only one variable at a time be changed in scientific experiments?

Doing so can enable you to pinpoint which independent variable had what effect on the dependent variable. If more that one variable is altered, there is no way of knowing which of them actually contributed to the change without doing further experimentation.


Why is it important to only test ONE variable at a time in s scientific investigation?

If you test more than one variable you don't know which one caused the changes.