What happens when a star can no longer fuse hydrogen to helium in its core quizlet?

What happens when a star can no longer fuse hydrogen to helium in its core? The core shrinks and heats up. Observations of star clusters show that a star becomes larger, redder, and more luminous after its time on the main sequence is over.

What happens when a star has no enough hydrogen to fuse into helium?

Once a star has exhausted its supply of hydrogen in its core, leaving nothing but helium, the outward force created by fusion starts to decrease and the star can no longer maintain equilibrium. The force of gravity becomes greater than the force from internal pressure and the star begins to collapse.

What happens when a Stars core runs out of helium?

Once the helium in the core is gone, the star will shed most of its mass, forming a cloud of material called a planetary nebula. The core of the star will cool and shrink, leaving behind a small, hot ball called a white dwarf.

What happens when helium fusion stops in a star?

Helium fuses in a shell around the core. After core helium fusion stops, He fuses into carbon in a shell around the carbon core, and H fuses to He in a shell around the helium layer. With each spike, convection dredges carbon up from the core and transports it to the surface.

What happens when most of the hydrogen in the core is fused into helium in the stellar core quizlet?

hydrogen fuses in the cores of low mass stars to follow the pp chain. because hydrogen is being fused into heliumin the stellar core, the core will evenutally exhaust its suppluy of hydrogen.

What happens after hydrogen fusion ceases in the core of a star?

When hydrogen fusion ceases in the core of a star, both the core and the outer layers are no longer in equilibrium. Once core hydrogen fusion ceases, the star will not regain equilibrium until: helium core fusion begins.

What do stars burn after hydrogen?

helium
Stars on the main sequence burn by fusing hydrogen into helium. Large stars tend to have higher core temperatures than smaller stars. Therefore, large stars burn the hydrogen fuel in the core quickly, whereas, small stars burn it more slowly.

What happens when hydrogen fusion runs out and stops?

A star remains on the main sequence as long as there is hydrogen in its core that it can fuse into helium. Eventually the hydrogen fuel in the core runs out and fusion stops, shutting off the outward radiation pressure.

What happens to nuclear fusion when the hydrogen in a star’s core runs low?

When the core hydrogen is used up and no more nuclear fusion occurs, the star’s outer stellar layers expand and the core shrinks. At this point, the star becomes a Subgiant Star .