what is convection current

Convection current is the transfer of heat within a fluid or gas caused by differences in temperature and density, creating a circular flow. It involves the movement of energy from one place to another, and is also known as convection heat transfer. This process occurs in fluids (liquids and gases) due to the differences in densities and temperatures, causing hot fluids to rise and cold fluids to sink, thereby creating a current within the fluid. Convection currents play a significant role in various natural phenomena, such as the movement of the Earth's tectonic plates, ocean currents, atmospheric weather, and the circulation of the mantle within the Earth's surface