Thermal ____ transfers involve energy being ____ from one thermal energy ____ to another. They can happen by ____, convection or radiation. Conduction and convection require ____ to transfer the energy i.e. energy can only be transferred in these ways through a ____. This is known as energy transfer by ____. Energy transfer by thermal ____ is the transfer of energy by infrared ____ waves. Infrared waves (or infrared radiation) are part of the electromagnetic ____ Like all electromagnetic waves, they ____ need a medium to travel through.

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