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When you analyze something, you usually specify two variables, one independent variable, which you can somehow alter or set specific values for, and a dependent variable, in which you see the effect of altering the independent variable. Strictly speaking, you don't have to have only ONE independent variable, but doing so makes the analysis process much simpler. As most phenomena depend on more than one variable, what one does is usually set all other variables as constant and only pick one independent variable. After that, one repeats the whole process choosing another independent variable (and leaving the previous one constant). After analyzing a set dependent variable by testing several independent variables, one can join the results together and get a single relationship between all the tested variables.

A good example of this would be the ideal gas law: PV=nRT. To arrive at this relationship between pressure, volume, number of moles and temperature, scientists had to test pairs of variables to get individual relationships. Only after finding each one could they add them all together to make an equation with four variables and not just two.

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Q: Why do you supposed to have only one independent variable?
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Why can you have only one variable in a experiment?

Actually, you have two - dependent and independent. But, you only have one variable because otherwise the answer wouldn't be accurate if you had more than one variable.


Does the independent or dependent variable change?

The Independent variable is the one you control. The dependent variable is controlled by the Independent Variable.


What is the factor of interest in an experiment called?

The independent variable. Any variable that is kept the same is a constant variable (although it is a contradiction in terms); any variable - usually only one - that depends on the independent variable is a dependent variable.


What does independent variables in science?

Hello, Well what you would be looking for is what an independent variable means. Assuming you understand what a variable is and a dependant variable is, here goes: An independant variable is the variable which you change in an experiment. Note you can only have 1 variable that can change in an experiment and more than one independent variable will result in an unfair experiment. An example is an experiment looking at the growth of trees in the Dark, in a dimly lit room and in the direct sun. The independant variable is the location of the experiment, because this is what is being changed. Simply: The Independent Variable is the variable that is independent and you change. The dependant variable is what changes when the independent variable changes. To conduct an experiment, you will have an independent variable and change that to see how the dependant variable changes with the independent one. Hope I Helped


Is the independent variable the one that does not change?

No, as the name Variable implies, it can and does change. Since it is 'Independent' its change is not a direct effect of the change of any other Variable. Additionally, the independent variable depends on the dependent variable.

Related questions

Independent variable in a sentence?

The independent variable in an experiment is the one that is manipulated in order to test a hypothesis. There will also be a control used in order to make sure that the variable is doing what it is supposed to.


Use independent variable in a sentence?

The independent variable in an experiment is the one that is manipulated in order to test a hypothesis. There will also be a control used in order to make sure that the variable is doing what it is supposed to.


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

Independent variable : )


Why can you have only one variable in a experiment?

Actually, you have two - dependent and independent. But, you only have one variable because otherwise the answer wouldn't be accurate if you had more than one variable.


The independent variable?

The independent variable is the one that is changing


Does the independent or dependent variable change?

The Independent variable is the one you control. The dependent variable is controlled by the Independent Variable.


What is the factor of interest in an experiment called?

The independent variable. Any variable that is kept the same is a constant variable (although it is a contradiction in terms); any variable - usually only one - that depends on the independent variable is a dependent variable.


What is one independent variable?

Time is often an independent variable.


Identify the independent variable?

The independent variable is the one that is changing


What is a dependent and independent varibale?

An independent variable is the one that you change in the experiment. A dependent variable is the one that you measure, it changes depending on the independent variable.


What is an independent variable of an experiement?

The independent variable is the thing in the expeirment that you purposly change. If I took different sizes of paper airplanes and counducted an expieremnt to see which one went the farthest, the size of the airplanes would be the INDEPENDENT VARIABLE while the distance of flight would be the RESPNDING VARIABLE P.S- there can only be one independent variable in a controlled expierement.


Independent variable is known as?

The independent variable is the one that you change in an experiment. The dependent variable changes because of the independent variable. You control the independent and observe the dependent.