What is a convection current?

Warm air sinks, cool air rises
Warm and cool air mixes
Warm and cool air both sink
Warm air rises, cool air sinks

1 answer

A convection current is a circulating movement of fluid, such as air or water, caused by the differences in temperature within that fluid. In the case of air, warm air rises because it is less dense than the surrounding cooler air. As the warm air rises, it creates a void that is filled by cooler air which sinks. This cycle of warm air rising and cool air sinking creates a continuous flow known as a convection current.
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