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Bio life ology the study of something scientific method A research method whereby a problem is identified, a hypothesis stated, and hypothesis is tested(not sure if this is right!) Controlled experiment an experiment in which only one variable is changed at a time. All other variables are kept unchanged manipulated variable(independent) is deliberately changed Responding variable(dependent) is the variable that is observed and that changes in response to the manipulated variable Scientific Theory In science a theory explains large numbers of different observations and is supported by an accumulation of evidence