What is the role of density changes in a convection cycle? 2 points
1) Density changes play a crucial role in driving the convection cycle. As a fluid is heated, it becomes less dense and rises due to the buoyant force. This upward movement creates a cycle of convection, with cooler, denser fluid being pulled in to replace the rising fluid.
2) The density changes also determine the direction and intensity of the convection cycle. Fluid with higher density will sink to the bottom, while fluid with lower density will rise to the top. This creates a continuous circulation of fluid and transfers heat from the warmer regions to the cooler regions.