Tuesday, August 24, 2010

What is the difference between controlled variables, independdent and dependent variables?

Controlled variable = One that you are able to keep constant throughout your experiment that would otherwise effect your results.





Uncontrolled = A variable that could effect your results but you have little to no ability to control it.





Independant variable = The variable that you will be changing or allowing to change in order to get your results





Dependant variable = The variable that you are actually recording. The whole point of your experiment.








For example if I was measuring how many rabbits there were on three differant fields. The different fields would be the independant variables and the number of rabbits would be my dependant variable.What is the difference between controlled variables, independdent and dependent variables?
In an experiment, the experimenter wants to test ONE thing; this is the independent variable. The response, which depends on changing the independent variable, is the dependent variable. A controlled variable is anything else which may change during an experiment, but the experimenter wants to remain constant.





For example, consider an experiment to determine the effect of a new fertilizer on making a plant grow taller. The INDEPENDENT VARIABLE is the presence of the fertilizer; that is the variable controlled by the experimenter. The DEPENDENT VARIABLE is the height of the plants with or without the fertilizer, because it dependsd on the independent variable. The CONTROLLED VARIABLES would be the amount of sunlight on the plants, the amount of water, the type of soil, etc.,What is the difference between controlled variables, independdent and dependent variables?
The Independent part is what you, the experimenter, changes or enacts in order to do your experiment. The dependent variable is what changes when the independent variable changes

No comments:

Post a Comment