Which is the transfer of thermal energy in matter with no overall transfer of matter? convection radiation conduction insulation

Radiation

Explanation:

There are three types of transfer of thermal energy:

- Conduction: conduction occurs when two objects/two substances are in contact with each other, and the warmer object transfers heat to the colder object through the collisions of the particles of the two objects. In this case, therefore, there is transfer of matter, so this is not the correct choice

- Convection: convection occurs in fluids. When a fluid is heated, the part of the fluid closer to the heat source gets warmer, becomes less dense and rises, replacing the colder part of fluid that sinks. Then, this part is heated, and the cycle goes on. In this type of heat transfer, there is transfer of matter, so this is not the correct choice.

- Radiation: radiation occurs when thermal energy is transferred through electromagnetic radiation. Since electromagnetic waves carry energy but not matter, in this type of heat transfer there is no overall transfer of matter. So, this is the correct answer.

Answer is conduction.