A Science Project on Which Cleaning Product Works the Best on Everyday Germs


If you're attempting to win a science fair, it is important to choose a project that is straightforward, easily testable and interesting for the judges to consider. A science project about cleaning products and germs follows all these guidelines. To make sure your science project is as well put together as possible, you'll want to consider which locations you take the germs from, the types of cleaning products you'll test and which procedure you should follow to test the cleaning products.

Choosing Germ Locations

  • In order to design a proper science project, you'll need to think about which bacteria-laden area you'd like to test. You may want to test areas obviously full of bacteria, such as the bottom of a toilet or even the area behind the toilet. Alternatively, consider some less obvious places that are still full of germs, such as a doorknob, an elevator button or a dish sponge. You can even choose two of these locations, and your science project will determine not only which cleaning product works the best but whether those results hold true when applied to a different area of the house.

Choosing Cleaning Products

  • If you're trying to create a science project to test out different cleaning products, you'll need to make sure you're choosing the best cleaning products for the job. Think about the areas you chose to test. If you've selected a toilet bowl, you'll probably want to try different toilet bowl cleaners whereas if you're working with a doorknob, you may want to try different types of multi-purpose sprays. Consider using some generic brands together with some more expensive name brands to see whether paying more actually delivers a cleaner home.

Creating Your Hypothesis

  • Do your research. Figure out what the active ingredient is in each cleaner, as well as what that ingredient is supposed to do. Also look at the advertising promises that each cleaner makes. Determine which one seems most credible, based on your research. Create your hypothesis based on the results of this research.

Testing Your Hypothesis

  • The protocol for this type of project is surprisingly simple. Just touch a cotton swab to the germ-filled surface and then touch it to the inside of a prepared petri dish. Repeat this with several petri dishes. You can then add different types of cleaning products to all but one of the petri dishes and let them sit for several days. You will be able to compare the growth rate of the bacteria in the control dish with the growth rate of the bacteria in the other dishes. You can also compare which cleaner killed the most bacteria by using this method.

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  • Photo Credit toilet bowl painting Gzhel image by Vasily Smirnov from Fotolia.com
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