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Can you relate availability of food storage in developed countries and compare it with developing world?

How does refrigerator keep it cool inside and why do we need it to be cool?

Do you know how much power your home refrigerator uses?

How do you reduce energy usage?

http://home.howstuffworks.com/refrigerator2.htm

https://www.youtube.com/watch?v=DhqBH1uxtRk

http://www.ck12.org/physics/Cooling-Systems/lesson/Cooling-Systems/

http://www.buzzle.com/articles/solar-powered-refrigerators.html

http://www.thedailygreen.com/going-green/tips/refrigerator-door-wastes-energy

http://home.howstuffworks.com/solar-powered-refrigerator1.htm

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Food storage and refrigeration

4th - 8th grade Most homes in the world today have refrigerators. Can you figure what people did before refrigerators were invented? Learn and explain how food storage is done at homes and in large scale storage facilities.

Time required: 4-8 hours Last date for contest submission: May 7, 2013. (power point or word document or create a Google site page

Refrigerator uses maximum power in the typical household. If you have the model of early 1990s, chances are it's using two to three times as much energy as current models. In fact, the fridge may account for as much as one-fifth of your annual electricity costs, according to Consumer Reports where 2 billion people around the globe have no access to electricity in the first place [NASA]

Learning Objectives

•Working principle of conventional refrigerator and purpose of refrigeration.

•Which other appliance do you think works on the same principle? Why do you think so? Which other appliance can you use instead of refrigerator ?

• If you do not have refrigerator, how will you keep the food fresh?

•How does a conventional refrigerator affect the environment? Suggest some ways to reduce the problem.

•Explain how eco-fridge and solar powered refrigerators work.

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