NPI Search The second method, most likely to be used by medical professionals, is to search by the health care provider's NPI number. To begin an NPI lookup please enter the NPI number in the search box below and click search. If a match is found you will be automatically directed to the provider's profile page.
Convection currents: a cycle of which heat energy in a liquid rises to the top then becomes dense because it is farther away from the heat source at the bottom. the energy sinks to the bottom then heats up again. the cycle repeats.
Convection works in liquids as well as in gases. Ocean currents have several different causes, many of which are due to changes in density. Some ocean currents are convection currents (see the picture below) The Gulf Stream is an ocean current that is driven, in part, by convection.