The transfer of heat that takes place because of the density difference in fluids is
convection.
called natural convection.
known as convection. Convection is the transfer of heat through the movement of a fluid, such as a gas or a liquid. This process occurs when there is a temperature difference within the fluid, causing the denser, cooler portions to sink and the warmer, less dense portions to rise.
To understand convection, it is important to know that fluids can be classified as either being less dense or more dense than one another. When a fluid is heated, it expands and becomes less dense. In contrast, when a fluid is cooled, it contracts and becomes more dense. These density differences create buoyant forces, which drive the flow of fluid in convection.
Now, to answer your question, the transfer of heat that occurs due to density differences in fluids is convection. This process can be observed in various natural phenomena, such as the movement of magma in the Earth's mantle, the circulation of air in the atmosphere, or the boiling of water in a pot.
If you have a specific scenario or question related to convection, feel free to provide more details, and I'll be glad to help further!