Bleach and Bacteria Science Fair Projects

Using Bleach

Bleach is a common household compound that is used for cleaning and disinfecting.
CAUTIONFumes from bleach are considered toxic so we recommend you use vinegar instead.

PURPOSE

The purpose of this experiment was to determine the effect of different antiseptics on the survival rate of bacteria.

I became interested in this idea because I was really fascinated with microbiology and how you get a sore throat or get sick and how you could help stop it.

The information gained from this experiment would help a lot of people like doctors, nurses, other heath professionals, and patients.

HYPOTHESIS

My hypothesis was that Clorox bleach would kill the most bacteria.

I based my hypothesis on a statement by Marie Clark a microbiologist. She told me, “In all my experience, I found that bleach works the best to kill bacteria. ”

EXPERIMENT DESIGN

The constants in this study were:

• The types of bacteria
• Testing Procedures
• The amount of antiseptics added
• The environment
• The types of antiseptics
• The agar plates

The manipulated variable was the type of antiseptic.

The responding variable was the diameter of the area where the bacteria didn’t grow.

To measure the responding variable I will use a special ruler called a caliper.

MATERIALS

science fair experiment antiseptics and bacteria continues here...