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How Wrappings Affect Spoilage

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by

Ria Narula

on 12 June 2015

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Transcript of How Wrappings Affect Spoilage

Abstract
Question
Which type of food wrapping will keep sliced apples placed in the refrigerator the least spoiled and the freshest?

Hypothesis:
I think that wrapping sliced apples in plastic wrap will keep them the freshest.


Materials
Apples, all the same type
Cutting board
Knife
Permanent marker
Aluminum foil
Wax paper
Plastic wrap
Sealable plastic bags (3)
Refrigerator
Plates
Notebook

Background Research
My experiment is testing which type of wrapping will spoil apples the least. One important cause of food spoilage is air and oxygen. Air consists of 78% nitrogen, 21% oxygen, and a 1% mixture of other gases. It can provide conditions that will enhance the growth of microorganisms, cause damage to foods with the help of enzymes, and it can cause oxidation. Some bacteria require oxygen for growth; they can often be found growing on the surface of foods when air is present. Microscopic bacteria cause food to spoil. Spoilage bacteria, consume unprotected foods and produce waste products. As long as nutrition and water are present, bacteria will multiply, sometimes rapidly. Bacterial waste is the cause of the foul smell and rotten appearance of spoiled food.
Variables
Independent Variable- The different wrappings that i will be covering the apple slices with.

Dependent Variable- The spoilage on the apple.


Controlled Variable- The apples that I will be using.

Procedure
Take four apples and cut each into 4 quarters; leaving you with 16 quarters total.
Do not let anything touch the apple that could contaminate it.
Wrap every three apple slices in a different wrapping; sealable plastic bag, wax paper, aluminum foil, plastic wrap, and no wrapping.
Place apple slices on to plate and place into refrigerator.
Leave apples in the fridge for about six days and record observations as time goes on.

By: Ria Narula
How Wrappings Affect Spoilage
Conclusion
Results
Credits
As a result, the apples appeared the freshest after being wrapped in the sealable plastic bags.
In conclusion, I found out that my hypothesis was incorrect. Wrapping sliced apples in plastic wrap was not the best idea. Out of the wrappings of aluminum foil, wax paper, sealable plastic bags, plastic wrap, and no wrapping, covering the apples in plastic bags kept them the freshest.
The purpose of my experiment was to test which type of wrapping would keep cut apples the freshest. I put sliced apples into different wrappings and left them in the refrigerator for about six days and observed them daily. The last step was to see that which apple was the least spoiled. The sealable plastic bags resulted in keeping the apples the freshest.
http://www.sciencebuddies.org/science-fair-projects/project_ideas/FoodSci_p025.shtml#procedure
http://www.foodsafetysite.com/educators/competencies/general/spoilage/spg1.html
http://www.livestrong.com/article/538862-what-causes-food-to-spoil-what-prevents-food-from-spoiling/
Future Directions
In the future, while trying this experiment again, I can change many of the variables. Instead of using sliced apples, I can use meat or different types of produce. Also, instead of using either plastic wrap, aluminum foil, plastic bags, or wax paper, I can use different materials to wrap the food in.
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