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  • 1. ConductionThe kinetic energy ofthe particles increases.particles of a solidThis is the transfer of heatin most solids.Heat is transferredby direct contact.
  • 2. Conductors and insulatorsmetalInsulators do not allowheat to move throughthem easily. plastic Double-glazed windowairair spacecorkConductors allow heat tomove through themeasily.
  • 3. Convectiongas particlesliquid particlesconvection currentsThis is the transfer of heat inliquids and gases.Heat is transferredby the movementof currents.
  • 4. GreenhouseRadiationsolarradiationradiationemitted byplantsThis is the transfer of heat by electromagnetic waves.No contact isnecessary betweenthe source and theheated substance.