Anything that can be changed in any way is a variable. so,,,,,an infinite number.
Day, time, heat, light, humidity, speed, what you ate for dinner the Wednesday before you go shopping.
So, quite literally, an infinite number.
Hope this helps.
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It depends what kind of experiment you do. For some you just need one. For others you may change two variables. In most cases you only change one
An experiment of any kind can have infinitely many variables. A controlled experiment can have just as many, provided that all but one are kept exactly the same.
You can only change ONE at a time. That's what makes it controlled. It's the only sure way to know what actually changed the experiment.
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to gather data from data to create an controlled experiment
Environmental factors if you cannot control them.Variable factors if you can control them.See link below for easy explanation:In an experiment the scientist is able to change the independent variable. To insure a fair test, a good experiment has only one independent variable. As the scientist changes the independent variable, he or she observes what happens. - See more at: http://www.chacha.com/question/what-part-of-an-experiment-is-the-factor-that-you-change#sthash.iyH25Jac.dpufIn an experiment the scientist is able to change the independent variable. To insure a fair test, a good experiment has only one independent variable. As the scientist changes the independent variable, he or she observes what happens. - See more at: http://www.chacha.com/question/what-part-of-an-experiment-is-the-factor-that-you-change#sthash.iyH25Jac.dpuf
It depends what kind of experiment you do. For some you just need one. For others you may change two variables. In most cases you only change one
true or false : in order to get the best results from an experiment, change as many variables as possible within the experiment?
An experiment of any kind can have infinitely many variables. A controlled experiment can have just as many, provided that all but one are kept exactly the same.
Scientists try to identify as many relevant variables as possible in order to account for potential confounding factors that could affect the outcome of the study. By identifying and controlling for these variables, researchers can increase the validity and reliability of their results, even when a controlled experiment is not possible.
You can only change ONE at a time. That's what makes it controlled. It's the only sure way to know what actually changed the experiment.
As many as you need. You can't change more than one if you want accurate results.
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