Answer :
CONVECTION The transfer of heat in liquids and gases take place by a process called convection.
In this process, the molecules move from hotter part to the colder part is called CONVECTION CURRENT.
In this process, the molecules move from hotter part to the colder part is called CONVECTION CURRENT.
As the earth rotates. Different parts of the earth get heated at different temperatures. For example equator gets more heat and near poles it is cold. Differences in the temperatures causes differences in the air pressure. This happens on a large global scale. This is called convection currents