It has been proven that temperature does effect the growth of mold. Freezing temperature completely stops the growth of mold. HYPOTHESIS
Bread mold will grow faster in a warm and damp environment. Also, light, temperature, & humidity influence the growth rates of bread mold. VARIABLES
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. MATERIALS
The materials required for this science fair project:
1. 5 slices of White bread
2. I cup of bottle water
3. 5 airtight, Ziploc plastic bag
4. A refrigerator
5. A magnifying glass
6. Adhesive labels
7. A writing Utensil, preferably a pen.
8. A pipet
9. A heater
1. Make sure you have all your required materials.
2. Make sure you label each zip lock/ baggy appropriately 3. The 5 slices of bread are prepared as follows :
4. A few drops of water are placed on the 1st slice of bread; place in a bag and it is kept in a dark and damp place, 5. The 2nd slice of bread is; placed in a bag & kept unattended under normal room conditions, 6. The 3rd slice of bread is placed in a bag; & is kept under the heater; 7. The 4th slice of bread is place in a bag; & is kept inside an air tight plastic bag and is kept near the window 8. The 5th slice of bread is place in a baggy & is kept in the refrigerator. 9. The bread slices are observed daily to see if there are any signs of mold growing. The results are recorded in the table. 10. If there is no sign of mold growth, the box will be ticked ‘ X’. If mold growth is found, the box is ticked ‘v’. DATA:
It is observed that the 1st bread slice with a few drops of water and kept in the dark space had started to grow mold the fastest. The 5th bread slice that was kept in the refrigerator took the longest for the mold to appear. Environment| Day 1| Day 3| Day 5| Day 7| Day 9| Day 11| Day 13| Day 15| Wet bread in dark area| X| X| Y| Y| Y| Y| Y| Y|
Bread in room Condition| X| X| X| X| Y| Y| Y| Y|
Bread kept under the heater| X| X| X| X| X| Y| Y| Y| Untouched Bread Near Window| X| X| X| X| X| X| X| Y| Bread in refrigerator| X| X| X| X| X| X| X| X|
What would happen if the experiment was repeated by baking the bread at high temperatures again before starting the experiment? The experiment can be repeated using different types of food like biscuits or cooked rice. It is observed that the 1st bread slice with a few drops of water and kept in the dark space had started to grow mold the fastest. The 5th bread slice that was kept in the refrigerator took the longest for the mold to appear. CONCLUSION:
The hypothesis that bread mold will grow faster in warm and damp environment is proven to be true. Mold will grow fast on bread in humid and warm conditions. Bread should be kept in dark, dry and cool places for it to last longer. Bread can also last longer if stored in the fridge or in airtight containers. Mold is an annoyance when it comes to storing food, but it has its usefulness too. Molds help in the decomposing process of decaying animals and plants. Penicillium is used in pharmaceutical work to produce medicine.
Definition: Temperature is the difference between hot and cold. It is measured on a standard scale. It is a numeric measurement of hotness and coldness. The measurement is based on a flow of heat between two connected objects. One of the most common scales of temperature is Celsius. Low Temperature storage
Low Temperature storage (LTS) is what refrigeration and freezing is called. LTS is very effective in slowing the...