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Controlled transfer of electrons is?
American Indians controlled the land west of the Appalachians.
Here is a helpful website that has a great example of a controlled experiment:
http://scienceray.com/physics/controlled-experiment-example/?237567#comment-237567&reload
A controlled experiment is an experiment where there are limited or no variables other than the one you are testing for.
it is when a egg float on the matter of something making it float.