how are convection currents set up in the air - Physics -

Question

how are convection currents set up in the air ???

Kranav Sharma · Accepted Answer

Here current refers to the flow of air from one point to another
while convection refers to the way it does so
It is a known fact that air flows, as we experience it the form
of a light breeze from a fan or gusty winds in a typical
thunderstorm The reason why air flows can be different but in the
natural world it occurs most often due to temperature changes
When we heat a gas it becomes lighter due to the widening of
intermolecular spacing upon receiving thermal energy This lightness
helps in movement of the gas This gas can be air in our atmosphere
which manifests its movement in the form of wind and breeze
This movement of warmer air through layers of successive cooler
layers is called convection current of air