Question

A transfer of heat within a liquid or gas that involves warm particles moving in currents is?

Answer 1

Convection.
Convection is the transfer of heat involving fluids (gas or liquids) with the heat rising cool sinking effect (lava lamp effect).

Answer 2

It is called convection. When warm air, or current, moves up and disperse outwards as cold air, or current, moves into the warmer region.