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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 experiment, the independent variable is the environment in which the bread slice is kept. The dependent variable is the 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 1st  slice of bread and it is kept in a dark and damp place,

b.    the 2nd slice of bread is kept unattended under normal room conditions,

c.    the 3rd slice of bread is kept under the hot sun,

d.    the 4th slice of bread is kept inside an air tight plastic bag,

e.    the 5th slice of bread  is kept in the refrigerator.

3.    The bread slices are observed daily to see if there  are any signs of mold growing. The results are recorded in the table below.

4.    If there is no sign of mold growth, the box will be ticked ‘ X’. If mold growth is found, the box is ticked ‘v’.

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Complexity level:
Project cost ($):
Time required:
1 hour to prepare, 8 days for observation
Material availability:
Very easily found. May be purchased at a supermarket/hobby store. Access to a refrigerator at school or at home is required.
Safety concerns: