In the outer 20% of the Sun's interior,energy is transported by

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In the outer 20% of the Sun's interior, the energy is transported by convection. This is because the temperature difference between the core and the surface of the Sun is so great that radiation is not an efficient way of energy transfer. As a result, the hot material at the core rises to the surface, cools down, and sinks back down, causing a cycle of convection. This convection is visible as granulation or cells on the surface of the Sun, and it is the reason for the Sun's magnetic field and most of its activity.

In the Outer 20% of the Sun's Interior,energy Is Transported