Conductors and insulators of heat

Sometimes when we are alone at home...

And hungry, we have no choice but to cook food by ourselves.

We have to put the pan on the stove. Since we are not great chefs ourselves, we can go for some noodles.

And while cooking, if we directly touch the metal handle....

We'll sense that the handle is too hot and we will feel unbearable pain. Sometimes, there are chances that we might even suffer burns.

Suppose if we accidentally forgot the spoon in the bowl, then the spoon also gets heated and this time we think twice before touching it.

The next time while cooking we have to take necessary measures to save ourselves from burns.

Most importantly we should use a pan with a plastic or wooden handle.

And we should remember to use wooden spoons.

Because on using wooden or plastic handles and spoons, we don't feel the heat.

So we can understand that we feel hot on touching some materials like metal spoons and don't feel the same on touching materials like the wooden spoon.

Let us understand why this happens.

To understand this, we need to know how materials react when heat is supplied to them.

Different materials react differently when the heat is supplied to them.

Based on this property of how materials react to heat, they are classified into two groups Conductors of heat Insulators of heat

The material or the substance which allows the heat to pass through it is called a conductor.

The material or the substance which does not allow the heat to pass through it is called an insulator.

Metals the good conductors of heat Some examples are Steel, silver, aluminum, etc.

Silver is the best conductor of heat among all metals.

Wood, plastic, wool, etc.., are all bad conductors of heat and thus, they are insulators of heat.

Water is also a bad conductor of heat.

There are many examples of conductors and insulators.

Coming back to our cooking part, since metals are good conductors, metal handles will allow the heat to flow through them and get heated.

When we touch them, we feel the heat and get our hand burned.

Whereas plastic and wooden handles are insulators, they don't allow any heat to pass through them.

Thus even on touching them, we don't feel the heat and keep our hands safe.

Revision

The material or the substance which allows the heat to pass through it is called a conductor.

The material or the substance which does not allow the heat to pass through it is called an insulator.

Metals are good conductors of heat, for example, Steel, silver, aluminium etc.

Wood and plastic are examples of insulators.

The end