convection currents - energy is transferred from the radiator to the nearby air particles by conduction, the air by the radiator becomes warmer and less dense, the warm air rises and is replaced by cool air. the cooler air is then heated by the radiator, at the same time, the previously heated air transfers energy to the surroundings. it cooles,becomes denser and sinks.this cycle repeats, causing a flow of air to circulate around the room, forming a convection current
