ummm 'cause u need a controlled experiment so the answer is correct and more accurate. People can get different answers and that's experimental value but a scientist need's the answer to be true value. I'm in 6th grade and this is 4 science. (: :P =D
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The Independent Variable (I.V.) is what the scientist changes. The Dependent Variable (D.V.) is the outcome of the I.V. There can only be one I.V. in a controlled experiment if you want accurate results
i received this information from wikipedia. http:/en.wikipedia.org/wiki/Experiment hope that helps :)
When a controlled experiment is not possible or practical, two types of scientific investigations are observation and modeling.
The reason they would is because it is a lot safer.
if something goes wrong they wont get the experiment right so it wont be a controlled experiment
a scientist will gain valuable experience
It gives the scientist something to compare their results to.
manipulated variable
to gather data from data to create an controlled experiment
to gather data from data to create an controlled experiment
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The factor a scientist changes in a controlled experiment is called the independent variable. It is the variable that is deliberately manipulated or varied by the scientist to observe its effect on the dependent variable.
The Independent Variable (I.V.) is what the scientist changes. The Dependent Variable (D.V.) is the outcome of the I.V. There can only be one I.V. in a controlled experiment if you want accurate results
i received this information from wikipedia. http:/en.wikipedia.org/wiki/Experiment hope that helps :)
They make a controlled experiment.
you might not get the experiment correct (: