Heat Transfer

Science — Second Preparatory

Common mistakes

Comparison aspect	Main idea	Keywords
Mistake	thinking that particles travel from one end of a metal rod to the other in conduction. Correct: the particles vibrate and collide in their places it is the energy that moves	thinkingparticlestravelmetal
Mistake	thinking that convection happens in solids. Correct: convection happens only in liquids and gases	thinkingconvectionhappenssolids
Mistake	thinking that radiation needs a material medium. Correct: radiation travels through a vacuum	thinkingradiationneedsmaterial
Mistake	thinking that air is a good conductor of heat. Correct: air is a poor conductor which is why it is used as an insulator	thinkinggoodconductorheat

Heat Transfer · 6 / 7