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How many germ-carrying droplets can cross cloth?

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Page 3 + ward ' s science 5100 West Henrietta Road • PO Box 92912 • Rochester, New York 14692-9012 • p: 800 962-2660 • wardsci.com Find materials for this activity at wardsci.com. Discover more free activities at wardsworld.com How many germ-carrying droplets can cross cloth? (continued) Questions 1. What did you observe? 2. Was one layer of cloth effective in preventing germ transfer? 3. Were two layers of cloth equally or more effective than one layer? 4. Can one or two layers of cloth contain all the germs produced by sneezing? 5. Was your face cover better than no cover at preventing germ transfer? Enter your data here:* https://forms.gle/aoKcqtScbXy5BE746 • One layer of cloth should help contain germs, but it is not the best • Two layers of cloth are even better! • Even with two layers of cloth not every single droplet is trapped in the face covering so it is very important to wash your hands and practice good hygiene! • Since germs in microdroplets are trapped in your face cover it is important you regularly wash your face covering! * Since experiments can take more than 1 day to finish, it may be better to write down all of your results on your experiment instruction sheet and submit them all at once if you plan on completing them all! A B C D E F G Plate CFU at 0 hour CFU at 24 hours CFU at 48 hours Diameter of plate in cm Radius of plate(one half of column D) in cm Area of plate = pi x r = (3.14 x radius x radius) in cm CFU/cm (column C divided by column F) 0 0 ____ = Baseline G 1 0 2 0 3 0

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