fairfolio
Saved Projects

Germs

CSEF · 2007 Product Science (Junior Division Only)

Zachary C. Radovich · Curtis Creek School, Standard, Tuolumne County

Overview

Objectives/Goals The objective of this experiment was to find which household cleaning products were most effective in killing germs. Vinegar will be the most effective household cleaning product in killing germs. Water will be the least effective. Methods/Materials Raw hamburger was rubbed on nutrient agar in ten labeled petri dishes. 10 labeled disks were soaked in each cleaning product and water, which was the constant. One of each disk was placed at equal intervals in each petri dish. Petri dishes were incubated for several days in a dark, warm closet. The zone of inhibition was measured and recorded. The values were added together to determine the average zone of inhibition for each product. Results Clorox Clean Up was the most effective household cleaning product in killing germ, with an average zone of inhibition of 13.5mm. Water was the least effective, with an average zone of inhibition of 0.7 mm. Conclusions/Discussion The results from this experiment did not support my hypothesis. The household cleaning products used were not as effective at killing germs as the had claimed.

Summary statement

To determine which household cleaners are the most effective in killing germs.

Help received

Mrs. Parker supplied the nutrient agar. Bridget helped me keep organized and helped with the typing. My mom for picking me up late after school when I stayed late to work on my project.

Competition history

  • CSEF 2007 Product Science (Junior Division Only) · Entry J1829

Resources

Related projects

Closest projects by meaning, across every fair and year in the corpus.

Browse more like this

Source: California Science & Engineering Fair public projects

Save projects to your library

Sign in with Google to keep track of projects you find interesting, organized into folders. An account also raises your daily allowance for “Has this been done?”, and lets you create a key for the MCP server with a much higher limit than anonymous use. Browsing stays public.

Continue with Google