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1) A cool place: usually a well-ventilated pantry on the north side of the house, supplied with marble slabs for shelves. Marble doesn't actually keep things cool, but it is cold to the touch. Cellars were also used - more effective because never exposed to sunlight, even through a wall; but subject to the growth of mould. 2) Evaporation. Items needing coolness could be covered with a damp cloth, or with a well-soaked porous pot. This method of cooling actually does work. Cellars, again, were usually damp and therefore also cooled by evaporation. 3) In a running stream, preferably one coming off a high mountain, which would run cold all summer. 4) For the rich, ice houses. Usually dug into the side of a hill, these were insulated by a depth of earth. Ice from ponds could be piled up in winter, and a sufficient quantity could last through most of the summer with careful management.
In the past, people used ice houses or root cellars to keep things cold. Ice would be harvested from frozen rivers or lakes in the winter and stored insulated with straw or sawdust to last throughout the year. Root cellars were dug underground to utilize the cooler temperatures for preserving food.
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What word means substances that keep warm things warm and cold things cold?
Things which keep warm things warm and cold things cold are referred to as insulators.
Does a thermos keep things hot?
Yes, it can also keep things cold.
How do you keep cold things cold?
The best way to keep something cold is to place it in a cooler that is filled with ice. You can also place things underground to keep them cool or place them in a refrigerator.
What do you use thermoplastic for?
To insulate : To keep warm things warm and cold things cold
Why doesn't plastic wrap keep things cold?
plastic wrap doesn't keep things cold because i don't even now?
How does aluminuim foil keep things cold?
Aluminum foil reflects thermal energy (heat) back towards its source, which helps keep things cold by preventing heat from entering or escaping. When wrapped around a cold item, it acts as a barrier that reduces heat transfer, helping to maintain the item's temperature for longer.
What is the purpose of the refrigerator?
To Keep food cold so it doesn't spoil. Also to keep things that are supposed to be cold cold. Also to keep foods that are supposed to be frozen frozen.
Why did they make a refrigerator?
to keep all the cold or frozen things nice and cold
Does foam keep things cold?
Yes it would as insulators keep in the heat and keep it out depending on whether the item is hot or cold.
What is the function of the freezer?
To keep things cold.
Can polystyrene keep cold things cold?
Yes, polystyrene is a good insulator and can help keep cold things cold by trapping air and reducing heat transfer. It is commonly used in cooler boxes and packaging to maintain the temperature of perishable goods.
How long can you keep shrimp in cold water in the refrigerator in cold water before it spoils?
3 to 5 days.
