Thermos Mechanism Science Project Idea

Science project idea on how a thermos bottle keeps hot liquids hot and cold liquids cold.

Thermos Mechanism- Science Project Idea

How a thermos bottle keeps hot liquids hot and cold liquids cold.

Thermos Mechanism Science Experiment

Fill one of two thermos bottles with hot water; fill the other with cold water.Set them side by side together with two ordinary bottles filled respectively with hot and cold water.Examine after two or three hours.Results?Conclusion?

An explanation of the structure of the thermos bottle will help us to understand its ability to keep hot things hot and cold things cold.

The space between the two bottles is a vacuum; the air having been pumped from it during the process of manufacture of the bottle.Evidently this vacuum in some way prevents the cooling or warming of the contents.We can understand this better if we realize that coldness is only a lack of heat, and that a body cools because heat escapes from it.It becomes warm because heat is absorbed.What is your conclusion as to the ability of heat to pass through a vacuum?A vacuum is called a poor conductor of heat.The polished inner surface of the thermos bottle also helps in preventing a loss of heat, since heat will not pass as readily from a highly polished surface as from a dull surface.

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