A fair test is an experiment where only ____ variable is changed at a time to see if it affects results. A ____ is something that can be ____ in an experiment. There are ____ of variables. ____ : The variable that is being tested and measured by the scientist. ____ : The variable that is change by the scientist to see if affects the results. ____ is something that can change in an experiment How many variables are changed in a fair test? => ____ The ____ variable that is being tested and measured by the scientist. The ____ variable that is changed by the scientist to see if affects the results.

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