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Killing Germs in the House

CSEF · 2004 Materials Science (Junior Division Only)

Lily C. Viramontes · Willits Charter School, Willits

Overview

Objectives/Goals To find out which household cleaner would best kill germs from chicken skin. Methods/Materials To test my questions, I rubbed chicken skin over marble tiles, thoroughly covering the tiles. Then I applied different cleansers to different tiles. I transferred the germs onto petri dishes with a sterile applicator. After the prepared petri dishes had been in an incubator for three days, the bacteria colonies were visible to the naked eye. I counted and recorded the number of colonies over one millimeter in diameter. Results I found that bleach killed the most bacteria, then came detergent, solvent and then normal tap water. Conclusions/Discussion According to my research bleach would kill the optimum amount of chicken bacteria.

Summary statement

Which household cleaner was most effective at cleaning germs from chicken skin

Help received

Mother helped with the procedure.

Competition history

  • CSEF 2004 Materials Science (Junior Division Only) · Entry J1142

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