<P> However , when air is hot , it tends to expand , which lowers its density . Thus , hot air tends to rise and transfer heat upward . This is the process of convection . Convection comes to equilibrium when a parcel of air at a given altitude has the same density as the other air at the same elevation . </P>
<P> However , when air is hot , it tends to expand , which lowers its density . Thus , hot air tends to rise and transfer heat upward . This is the process of convection . Convection comes to equilibrium when a parcel of air at a given altitude has the same density as the other air at the same elevation . </P>
as air in a given level in the atmosphere is warmed it tends to rise . this is referred to as
as air in a given level in the atmosphere is warmed it tends to rise . this is referred to as
Convection
Convection