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Because if you change more than one variable, you won't know which one was responsible for any observed effect, or indeed whether they both had a part in it. The worse case of all would be if they both had an effect but the effects cancelled out.

lots of times it is just not possible to change only one variable, especially when you are observing rather than experimenting. There are complicated mathematical techniques to try and sort things out when more than one variable is being changed at the same time.
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Q: Why does it make sense for scientists to test just one variable at a time in an experiment?
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What are Variables in an experament?

A variable of an experiment is anything that is changed either deliberately, or as a result of changing something else. An independent variable is one that is changed to obtain a different result. A dependent variable is the thing that changes as a result of changing the independent variable. There is also the controlled variable, or just control, which does not change throughout the experiment. A test or a trial


Why might a scientists use a simulation in a controlled experiment?

to observe a 1000year process in just one day


Why might a scientists use a simulation in controlled experiment?

to observe a 1000year process in just one day


How many variables do you need in a science experiment?

Ideally, an experiment should test only one variable (the independent variable) at a time. If you have two or more variables changing at the same time you have no way of knowing which variable is causing your results.


After scientist make a hypothesis they perform a?

Answer According to the scientific method, scientists perform an experiment. Answer I suppose you could say scientists perform an experiment next, but that is skipping some crucial points. How can you perform an experiment when all you have are ideas? Before you test out your hypothesis, you need to gather materials and draw up your procedure. Scientists just don't jump into something; they need a step-by-step plan of how they will carry out their test. In addition, they will also make predictions given their hypothesis. They need to know what result(s) will support or falsify the initial hypothesis.

Related questions

What do you call an experiment with one variable?

Well in the case that it does have a variable, even just one, it would still be a variable experiment because that one part of the experiment may still cause a different effect/result when changed!!!


What do you call an experiment with only one variable?

Well in the case that it does have a variable, even just one, it would still be a variable experiment because that one part of the experiment may still cause a different effect/result when changed!!!


Why does it makes sense for scientists to test just one variable at a time in experiment?

Because if you change more than one variable, you won't know which one was responsible for any observed effect, or indeed whether they both had a part in it. The worse case of all would be if they both had an effect but the effects cancelled out.lots of times it is just not possible to change only one variable, especially when you are observing rather than experimenting. There are complicated mathematical techniques to try and sort things out when more than one variable is being changed at the same time.


Is temperature a dependent variable?

yes. the independent variable is what you're testing. it can be a dependent variable depending on the experiment, however it could just as easily be the control if you keep it the same, or the independent if it is the variable you are manipulating rather than measuring. again it all depends on the experiment


What are Variables in an experament?

A variable of an experiment is anything that is changed either deliberately, or as a result of changing something else. An independent variable is one that is changed to obtain a different result. A dependent variable is the thing that changes as a result of changing the independent variable. There is also the controlled variable, or just control, which does not change throughout the experiment. A test or a trial


Identify an independent variable in an experiment?

AnswerIt is a variable in an equation that is not dependent on any other variable in the equation. For example, in the equation...y = 3x + 5y is a dependent variable because its value depends on the value of x. The variable x is an independent variable.this dosent even make sense that much so try to find a diffrent one thank you..note: bye the way this is correct and i am going the wrong way i said it dosent make that much sense and yeah it does do just belive that this makes sense sorry about that and just forget that note at the top it is very very wrong ...AN independent variable is the variable that the experimentor changes.An independent variable is an input value that one can vary to obtain an output value which is dependent variable.For example in equation y = 3x then x is independent input variable that produces an output y where y is the dependent variable, that depends on the value of x


Why might a scientists use a simulation in a controlled experiment?

to observe a 1000year process in just one day


Why might a scientists use a simulation in controlled experiment?

to observe a 1000year process in just one day


Why do scientists perform experiment?

Because they need to know if it/they are going to survive or destroy or just to see what happens to it.


How many variables do you need in a science experiment?

Ideally, an experiment should test only one variable (the independent variable) at a time. If you have two or more variables changing at the same time you have no way of knowing which variable is causing your results.


What is the proper format of a scientific question?

There is no RIGHT format. Just ask the question that you are trying to answer in your experiment. For example, Why is the sky blue? This works just fine. or, What are the effects of soda (independent variable) on plants (dependent variable).


List three things that you can control and or measure in this experiment in chemistry lab?

There are more than three possible controls for any experiment, as a control is just a variable that something is being tested against and compared to. Three would include temperature, color, or weight - all things that may be easily controlled among a group of test subjects.