Heat Transfer - Conduction and Convection | GCSE Physics | Doodle Science

Thanks for Watching! Like and Subscribe if you enjoyed and learnt something! This is the new Channel just for Doodle Science! Script: Conduction is the transfer of heat between substances that are in direct contact with each other and it mainly happens in solids. The heat is conducted from atom to atom using the kinetic energy of the particles, in other words by vibrating. The better the conductor, the more rapidly heat will transfer. Have you ever noticed that metal benches tend to feel colder than a wooden ones? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your bottom better than wood and you perceive the heat that is leaving your bum as cold. Metals are particularly good at conducting heat because of their free electrons that move about the structure colliding with the positive ions and transferring the kinetic energy to them. Convection happens in gases and liquids. As a gas or a liquid is heated, it warms, expands, and rises