Kids Projects
 

Bacteria: Don't Love It, but Leave It

The Objective : The objective is to determine which cleaner I should use to clean my bathroom based on which would kill the most bacteria.

Methods/Materials

The materials included: petri dishes, agar (a gelatinous material derived from seaweed), sterial swabs, blotting paper and household cleaners.

The petri dishes were prepared with agar to make an environment for bacteria growth. The sterile swabs were used to collect bacteria samples from various surfaces in my bathroom.

The bacteria was left in the prepared dishes to allow the bacteria to multiply.

Three household cleaners were sprayed onto the blotting papers, which made them sensitivity squares.

The squares were placed on the different bacteria colonies to see which reduced the most bacteria and prevented growth most effectively.

Results

Cleaners with alcohol actually helped the bacteria to grow. An overuse of cleaners and disinfectants can actually inhibit our ability to develop anti-bodies to the most harmful bacteria.

While all the household cleaners reduced the size of their respective bacteria colonies, only one reduced the bacteria in the whole dish.

Conclusions/Discussion

The results helped me to decide on one cleaner, Lysol All-Purpose with Belach, as the best to use on my bathroom.

The results proved my hypothesis that a good cleaner would significantly reduce the bacteria present. My project was about the best way to kill bathroom bacteria, but showed me how to life peacefully with non-harmful bacteria and kill only the harmful germs lurking.

This project is meant to identify the best household cleaner to reduce the bacteria in my bathroom.

Science Fair Project done By Olivia D. Partone

 

 

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