The most efficient means of energy transfer is now convection and we find ourselves in the region of the Sun's interior know as the convection zone. The hotter material near the top of the radiation zone (the bottom of the convection zone) rises up and the cooler material sinks to the bottom. As the hot material reaches the top of the convection zone it begins to cool and sink, and as it sinks it heats up again and will rise. This produces a rolling motion much like that in a pot of boiling water.
The hot material follows a direct path through the convective zone and the
energy is transferred much faster than it is by radiation. It takes only a
little more than a week for the hot material to carry its energy to the top
of the convection zone.