When a star depletes its core supply of hydrogen, _________ causes the core to collapse while increased gas _________ is exerted on the atmosphere.

Question

Quizplus · Accepted Answer

When the core supply of hydrogen is depleted, the gravitational force becomes stronger than the outward pressure, causing the core to collapse. This collapse causes the temperature and pressure in the core to increase, which leads to the fusion of heavier elements. At the same time, the outer layers of the star are pushed outwards due to the increased gas pressure. Thus, gravity and pressure are the two forces responsible for the collapse of the core and the outward pressure on the atmosphere, respectively. Option D correctly identifies these forces.

When a Star Depletes Its Core Supply of Hydrogen, _________