Insulasion helps to keep heat contained or controlled.
Plastic, paper and tin have the same average cooling rate. Whereas glass has an average cooling rate of 9. Polystyrene has an average of 8 as the cooling rate. Having a lower number for the average cooling rate means that the material is good at insulating, but having a higher number means that the material is bad at insulating.
Plastic has a zero average heat rate which means that plastic is a good insulator. Paper and polystyrene have the same heat rate of two. A glass's heat rate has an average of 3.5. Having a lower number as the average heat rate means that the material is good at insulating and having a higher number also means that the materal is bad at insulating.
For cool insulation, if the tempature warms up quickly it also means that it has bad isulation. This is because the heat is coming in and the coldness is not contained. A good insulator for the cold is: plastic.
It is important to know the differences between heat insulation and cool insulation because it can help people identify whether something has a bad insulation or a good insulation.
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