An organized way to solve a problem through experimentation & observation.
Start with an Observation Example : Listerine seems to be a better mouthwash and it has more antiseptic ingredients
Form a hypothesis Make an educated testable guess based on your knowledge.
Example: Hypothesis : How will a high antiseptic mouthwash affect bacteria in comparison to other mouthwashes?
Design an Experiment Devise a way to test your hypothesis. Create aCONTROLLEDexperiment.
A controlled experiment MUST have 2 groups. CONTROL GROUP: all conditions remain the same EXPERIMENTAL GROUP: only the condition that you are testing for is changed ONLY 1 condition is changed!
Establish the variables for your experiment. INDEPENDENT VARIABLE: the variable that is changed by the experimenter (X axis for graphing) DEPENDENT VARIABLE: the effect measured due to the change of the independent variable (Y axis for graphing)
Mouthwash Experiment Petri dish Bacteria grown from swab Control Group -no mouthwash Experimental Group Listerine Scope Wal-Mart brand
Mouthwash Experiment INDEPENDENT VARIABLE: DEPENDENT VARIABLE: Type of Mouthwash Amount of bacteria killed
Get Results & Analyze Data Run the experiment & record the data