Question on: SS1 Physics - Heat and Thermodynamics

Convection is the process of heat transfer through the movement of fluids (liquids or gases). It occurs due to the density differences caused by temperature variations within the fluid. When a fluid is heated, it becomes less dense and rises, creating a convection current. As it rises, it transfers heat to the surrounding environment. On the other hand, when a fluid cools, it becomes denser and sinks, completing the convection loop.

An example of convection is the heating of a room using a radiator. The warm air near the radiator becomes less dense and rises, creating a convection current that circulates the warm air throughout the room. Another example is the circulation of air in the atmosphere, where the sun heats the Earth's surface, causing warm air to rise and cool air to sink, resulting in wind currents.