science

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convection: liquids and gases are fluids. the particles in these fluids move from place to place. convection happens when particles with a lot of heat energy in liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Materials that do not let heat travel though them easily are called insulators. Materials that do let heat travel through easily are called conductors. Examples of insulators : wool, wood, plastic and paper. Examples of conductors: aluminium, copper, foil and air.

Heat is conducted through a solid object by when heating, particles inside gain energy and vibrate more, bumping into each other and passing the energy on. Solids are better heat conductors than liquids because solids have particles that are in closer compact.

Radiation: the process in which energy is emitted as particles and waves