Question

In which area of the sun does gas rise as it heats up, then fall back down as it cools

Answer 1

Answer:

The convective zone.

Answer 2

Convection Zone: Just beneath the photosphere, and extending inward to about 0.7 Rsun, is the convection zone. Energy generated in the core of the Sun moves outward through this layer by a boiling motion in which hot plasma rises, releases some of its energy, cools, and then sinks again.