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Convection

I'll tell you all i know ;) convection is the heat transfer through atoms or molecules that move, so that's liquids or gases. It's difficult to see in gases, it just kind of, happens. If you turn a radiator is turned on and the room is full of cool air, the radiator in the middle will warm up the particles above it and as warm things rise these heated particles will rise, pushing the cool air towards the radiator to be heated too.

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