jdnyoda Posted February 7, 2017 Report Share Posted February 7, 2017 Hi, I already have started my IA, and I'm almost done with writing my introduction, but I cannot for the life of me figure out what to write for my hypothesis. My IA is on which face washes prevent bacterial growth best. I have participants use face wash, wash it off, and then I take a cotton swab and collect cells from their forehead which I then swipe onto petri dishes with nutrient agar in them. I'm using St. Ive's Apricot Scrub, Clean & Clear's Morning Burst and Deep Action cleansers, Pond's Cold Cream, and no face wash for a comparison. I can find the ingredients for all, but I'm having trouble finding what amounts are in each and how their different ingredients compare to each other. Any ideas on how to set up a hypothesis that makes sense? Reply Link to post Share on other sites More sharing options...
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