A student wants to investigate the amount of bacteria on door handles. Bacteria is commonly found on door handles and the amount varies based on the location of the door. The student is interested in studying the amount of bacteria found on the bathroom door handle compared to the kitchen pantry door handle. What must the student do in planning this investigation? Explain how you would you apply the scientific method to this question.

Your answer should include at least five complete sentences.
Be sure to check your grammar and spelling.