Investigate the ways in which heat can be transferred. Physical processes - Energy and energy transfer - Heat transfer Learning Points Conduction is the transfer of energy from one molecule to the next. Convection is the transfer of heat through the movement of molecules in a liquid or gas. Radiation is the direct transfer of heat. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.