Project cost ($):
1 day for preparation, 5 days for the science project experiment
Access to laboratory equipment (eg. petri dishes)
Always follow laboratory safety guidelines and always practice sterile technique when handling microbes. Never have any food or drink at your workstation and always thoroughly wash your hands with disinfectant soap or alcohol before leaving your workstation. Always dispose of used material in a biohazard bag. If none are available, the bacteria should be destroyed with bleach before being disposed of. Knives should be handled under adult supervision.
Table of Contents
This science fair project aims to discover which type of processed poultry meat possesses the largest amount of bacteria. This experiment will be conducted using meat from a fresh chicken, irradiated chicken and frozen chicken
The irradiated chicken possesses the least amount of bacteria.
Bacteria in meat
Bacteria, pathogens, food-borne diseases, irradiation, gamma rays
The materials required for this science fair project are:
1. The independent variable for this science fair project is the type of processed chicken meat – fresh, frozen and irradiated. The dependent variable is the size of the bacteria growth in the Petri dish. This is determined by measuring the size of the bacteria growth using a ruler. The constants (control variables) are room temperature, the amount of sunlight and the ingredients in the Petri dish agar.
The results show that the irradiated poultry meat has the least amount of bacteria growing on it, followed by the fresh chicken meat. The frozen chicken has the highest amount of bacteria growth.
Plot your results on a graph as shown below.
The hypothesis that irradiated chicken has the least amount of bacteria growing on it is proven to be true.
The science fair project can be repeated by varying the types of food/ parts of the meat that are tested for bacteria. Perhaps you could experiment with different methods of thawing meat, or evaluate whether the type of packaging used for the meat affects the bacteria count.
The truth about irradiated meat - http://www.mindfully.org/Food/2003/Irradiated-Meat-TruthAug03.htm