The term for the transfer of heat through currents in fluids is convection. This process occurs when warmer, less dense fluid rises, while cooler, denser fluid sinks, creating a cycle. This principle applies in various systems, including atmospheres and oceans, where it helps distribute thermal energy, influencing weather patterns and climate dynamics. Understanding convection is essential for meteorology and engineering, as it plays a critical role in heat transfer designs, such as heating systems and refrigeration.