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scientific investigation - Coggle Diagram

- - - - a controlled experiment includes:
        
        Defining variables
        
        1- Dependent variable: an observation in response to experimental conditions.
        
        2- Independent variable: is the variable that can be controlled by the experimenter.
        
        3- controlled variables: factors other than the independent variable that might affect the dependent.
        
        Outlining a procedure: a sequence of steps.
        
        level of treatment
        
        replication
        
        control
        
        Determining controls