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What is freezer burn and how can something burn in a freezer?

It’s the fundamental physics of sublimation. Water evaporates at all temperatures even from what appears to be a solid. That’s why ice cubes shrink in your freezer and in fact will eventually disappear. When the constantly oscillating moisture molecules in the meats and vegetables stored in your freezer migrate to the surface crystals of ice are formed. Even if the package has never been opened. What’s left behind is dry and shriveled up and looks burned. Can you prevent freezer burn? Only if you have a freezer capable of reaching absolute zero, -459 degrees Fahrenheit, where according to the Third Law of Thermodynamics, all molecular movement ceases.
	Since the normal freezer temperature is 0 degrees Fahrenheit there is no way to completely prevent freezer burn. You can slow down freezer burn by filling plastic milk containers with water leaving room for expansion and keep them in your freezer to help maintain the temperature. Meats and vegetables stored in a manual defrost freezer will last longer then those stored in automatic defrost freezers.
That’s because the temperature of a manual defrost freezer remains closer to 0 degrees while the temperature of automatic defrost freezers fluctuates. The good news is that food with freezer burn is safe to eat if you like eating dried, wrinkled up meats and vegetables What is the correct refrigerator temperature? The ideal refrigerator fresh food section temperature is 38 degrees Fahrenheit. The ideal freezer frozen food section or free standing freezer temperature is 0 degrees Fahrenheit. Generally to accomplish this all you need to do is set your controls to the center position. On most refrigerators there is only one cooling section and that is in the freezer. Therefore most freezer controls simply allow more or less air to pass through the fresh food section. Usually a thermostat or thermistor in the refrigerator's fresh food section controls the amount of time the refrigerator operates.