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Ew... My Apple :(

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by

Sonali Chaturvedi

on 9 February 2015

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Transcript of Ew... My Apple :(

Eww... My Apple!
Hypothesis
I have inferred this statement is true according to my research:
If food wrappings are made to prevent spoilage, then the plastic wrap will do a better job of preventing spoilage.
Conclusion and Real Life Application
In conclusion, my hypothesis was incorrect. I believed that the plastic wrap would preserve an apple best. Instead, the ziploc bag did. This probably has something to do with vacuum packing. The wax paper was the least successful because it was exposed to too much oxygen, effecting in oxidation. An error that may have occured is that some of the apples were cut unevenly. This would change the results of my experiment.

This project could relate to real life in many ways. My project was something that happens alot. You could use the results of my experiment when you are packing sliced apples in your lunch. You will know that the zipper bag will keep it preserved.
Data and Observations
Day 1- All of the apples already started to brown near the core
Day 5- The oxidation is moving from the core and corners outward. There is condensation going on in the ziploc bag. The none has some brown bruises that are mushy.
Day 11- The core of the plastic wrap apple is mushy. The apple that has no wrapping is all messed up on the edges and it looks like milk chocolate...
Day 14- The plastic wrap apple has icky stuff everywhere and it stayed firm for the most part (3rd place). The zipper bag apple would probably be 1st place. There are dots on the side and a brown core,but the apple stayed firm. Aluminium foil is good and stayed firm , but its also very dry (2nd place). The apple with no wrapping is pretty bad... I would rate it 4th place and the inside did not stay firm, it turns into applesauce. The wax paper apple has inspired the title of my project. It is very squishy and soft, but this one grew mold! This apple would be rated 5th place.
Background Research
Oxidation is the interaction of oxygen and substances it gets in contact with. Oxidation is a good and bad thing. It can be good when it is forming super-durable anodized aluminum, but it can also be destructive; an example is when it rusts your automobile or spoils fresh fruit. In the case of fruit, the skin provides a barrier against oxidation, so when it is cut, so is the barrier and oxidation can happen quickly now. To prevent oxidation, you have to provide a layer of material so oxygen doesn’t come in contact with the object.
Desiccation is the process when something loses water and dries up. So, when I cut the apple, the skin will stop protecting it, and it will slowly lose water; it will desiccate. A desiccant is something that helps draw water out of something.
Aerobic bacteria require oxygen to live and grow. So, if I leave lots of air in my packaging, then the aerobic bacteria are going to grow and spoil the apple. Food preservation is a way to preserve your food. Some examples of food preservation are plastic wrap, aluminum foil, refrigeration, and many more.


Question
How do food wrappings affect spoilage?
(Aluminium Foil, Wax Paper, Plastic Wrap/Saran Wrap, Zipper Bag, and None)
I will test to see which of the food preservers above best keep an apple slice from spoiling.
Materials
4 apples
Knife
Aluminium Foil (about 60 cm)
Wax Paper (about 60 cm)
Plastic/Saran Wrap (about 60 cm)
3 Zipper Bags
Refrigerator
Bibliography
Procedures and Variables
1. Cut all four apples into quarters
2. Wrap 3 of the quarters into Aluminum Foil and repeat for Wax paper, Plastic Wrap, and Ziploc bags; leave 3 of the apples unwrapped, you will have 1 left
3. Place each wrapping group together and put into refrigerator (Place skin side down for all of them)
4. Over a period of 14 days, check your slices and record your observations daily
5. Take them out after 14 days and observe each one. Sort the slices into wrappings and freshness. Observe. Record.
*Trials: 3 apples per wrapping

Independent variable- Type of wrapping
Dependent variable- The spoilage
Abstract
The purpose of this project was to see which food wrapping would preserve an apple the best over a course of 2 weeks/ 14 days. I cut the apples, wrapped them and put them in the refrigerator. Everyday, I would take pictures, record observations and continue my movie. I concluded that the Ziploc preserved apples best and the wax paper preserved the apples worst over the 2 weeks/ 14 days.


"Yuck, What Happened to My Apple ? How Food Wrappings Affect Spoilage."Yuck, What Happened to My Apple? How Food Wrappings Affect Spoilage. N.p., n.d. Web. 23 Sept. 2014. <http://www.sciencebuddies.org/science-fair-projects/project_ideas/FoodSci_p025.shtml#summary>.

Pollick, Michael, and Niki Foster . WiseGeek. Conjecture, 20 Sept. 2014. Web. 23 Sept. 2014. <http://www.wisegeek.com/what-is-oxidation.htm>.

McMahon, Mary, and O. Wallace. WiseGeek. Conjecture, 16 Aug. 2014. Web. 23 Sept. 2014. <http://www.wisegeek.com/what-are-desiccants.htm>.

Ainoa, Jen, and S. Pike. WiseGeek. Conjecture, 22 Aug. 2014. Web. 23 Sept. 2014. <http://www.wisegeek.com/what-is-aerobic-bacteria.htm>.

"What Is Food Preservation?" WiseGEEK. N.p., n.d. Web. 23 Sept. 2014. <http://www.wisegeek.org/what-is-food-preservation.htm>.
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