You only change one variable; if you changed multiple variables you wouldn't know which one caused a change.
true or false : in order to get the best results from an experiment, change as many variables as possible within the 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
In a fair test, only one variable should change while all other variables are kept constant. This helps to isolate the effect of the variable being tested and ensure that any observed changes are a result of that specific variable.
There are many different things that are measured and tested by the data collected in an experiment. Color changes are one thing that can be measured and tested for example.
An experiment can go wrong for many reason. The number one reason can simply be due to human error. Other factors could be the design of the experiment, a spill done in the experiment, or a miss calculation.
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There are three types of variables tested: manipulated variables, controlled variables, and experimental variables.
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.
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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As few as possible.