Transfer Of Thermal Energy

Question 1

Conduction

Answer 1

The transfer of thermal energy (heat) from a region of higher temperature to a region of lower temperature, through molecular vibration/ free-electron diffusion in metals.

Question 2

Molecular vibration

Answer 2

molecules at the hot end vibrate vigorously, colliding with their neighboring molecules, making them vibrate as well

Question 3

Free-electron diffusion

Answer 3

free electrons at the hot end move faster as a result of having more kinetic energy, moving quickly to the cooler part of the material and transferring their energy to other molecules by colliding with them

Question 4

Convection

Answer 4

The transfer of thermal energy (heat) by the bulk movement of the fluid, due to convection currents (formed by density differences)

Question 5

Radiation

Answer 5

The transfer of thermal energy from hot to cold regions by means of electromagnetic waves (infra-red radiation), without the need of a medium.