Safe storage of bread
The materials required for this science fair project:
- 5 slices of bread
- Some water
- An airtight plastic bag
- A refrigerator
- A magnifying glass
1. For this science fair project, the independent variable is the environment in which the slices of bread are kept. The dependent variable is the rate of growth of bread mold. This is determined by inspecting the bread with a magnifying glass. The constants (control variables) are the room temperature, the age of the bread and the handling of the bread.
2. The 5 slices of bread are prepared as follows:
a. a few drops of water are placed on the first slice of bread and it is kept in a dark and damp place,
b. the second slice of bread is kept unattended under normal room conditions,
c. the third slice of bread is kept under the hot sun,
d. the fourth slice of bread is kept inside an air tight plastic bag,
e. the fifth slice of bread is kept in a refrigerator.
3. The bread slices are observed daily to ascertain if there are any signs of mold growing. The results are recorded in the table below.