Question

Which materials are typically used as thermal insulators? Check all that apply.

Answer 1

Explanation:

Substances which do not allow the flow of heat energy through it are known as thermal insulators.

For example, plastic, rubber, ceramics, foam, wood etc are insulators.

On the other hand, substances which allow complete passage of heat through them are known as conductors.

For example, copper, silver etc are conductors.

Thus, we can conclude that foam , ceramic , wood , and plastic materials are typically used as thermal insulators.

Answer 2

Answer : The correct options are, (B) Foam, (C) Ceramic, (D) Wood and (E) Plastic

Explanation :

As we know that the conductor is the material that conduct or transmits the energy or electricity through them and insulator is the material that resist the energy transfer.

There are different types of insulators and conductors which are:

Electrical conductor : It is a type of material that conducts electrons, protons and ions. It conduct electricity. For example : silver, gold, copper, steel, brass, etc.

Thermal conductor : It is a type of material that conducts heat. For example: diamond, silver, gold, etc.

Electrical insulator : It is a type of material in which the electrical charges do not flow freely that means very little amount of electric current flow through them. For example : glass, plastic, rubber, porcelain, pure water, dry paper, dry wood, etc.

Thermal insulator : It is a type of material that reduces the transfer of heat between the object in thermal contact. For example : polystyrene foam, water, wool, plastic, ceramic, wood.

Hence, the materials typically used as thermal insulators are, foam, ceramic, wood and plastic.