What causes convection currents?

Convection currents are caused by differences in temperature and density within a fluid, such as air or water. When part of a fluid is heated, it becomes less dense and rises, while cooler, denser fluid sinks. This movement creates a circular motion known as a convection current. The heat source could be from the sun, a heating element, or another external force. This process is responsible for the transfer of heat throughout the fluid, making it an important factor in weather patterns, ocean currents, and even the heating and cooling of buildings.

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