All Science Fair Projects

Over 1000 FREE Science Fair Project Ideas!

Project title Concentration of disinfectant and survivability of bacteriaFeatured science projectScience project video
Difficulty Level Middle school
Project page  Click here to view this science project

The purpose of this experiment is to determine the relationship between the concentration of disinfectant and its effectiveness in destroying bacteria. 

Instructions preview
1. The independent variable of this experiment is the concentration of disinfectant used, which is 10%, 20%, 30%, 40% and 50% respectively. The dependent variable is the diameter of the zone of inhibition formed around the bacteria culture. The constants in this experiment include using the same type of bacteria, type of disinfectant, temperature of incubator and incubation time. 2. Prepare a sterile area in the science laboratory Wipe the work table’s surface area and all the materials with alcohol soaked wipes. Do not wipe the nutrient culture or open the cover of the Petri dish. Leave the bacteria .....
Search science fair projects Browse science fair projects
Science kits, science lessons, science toys, maths toys, hobby kits, science games and books - these are some of many products that can help give your kid an edge in their science fair projects, and develop a tremendous interest in the study of science. When shopping for a science kit or other supplies, make sure that you carefully review the features and quality of the products. Compare prices by going to several online stores. Read product reviews online or refer to magazines.
Copyright (C) 2020 All Science Fair All Rights Reserved. Site
All Science Fair Projects Homepage