Star Formation and Life Cycle Quiz

What initiates the process of star formation?

• A collision of planets

• A cloud of interstellar dust

• A supernova explosion

• A black hole formation

Why is a high temperature necessary for hydrogen nuclei to fuse?

• To increase gravitational force

• To overcome electrostatic repulsion

• To decrease kinetic energy

• To reduce radiation pressure

What equation describes the conversion of mass into energy during thermonuclear reactions?

• Planck's Constant

• Newton's Second Law

• Hubble's Law

• Einstein's Equation

During the main sequence phase, what is the primary process occurring in a star?

• Fusion of helium into carbon

• Fusion of hydrogen into helium

• Formation of a black hole

• Expansion into a red giant

What happens to a star like the Sun when it runs out of hydrogen fuel?

• It turns into a red giant

• It becomes a black hole

• It explodes as a supernova

• It remains a main sequence star

What prevents a white dwarf from collapsing further?

• Electron degeneracy pressure

• Radiation pressure

• Neutron degeneracy pressure

• Gravitational force

What is the Chandrasekhar limit?

• The maximum mass of a neutron star

• The maximum mass of a white dwarf

• The minimum size of a black hole

• The minimum temperature for fusion

What is the fate of a massive star after a supernova if it is not too heavy?

• It forms a black hole

• It turns into a neutron star

• It remains a red supergiant

• It becomes a white dwarf

What provides the radiation pressure in a neutron star?

• Gravitational force

• Neutron degeneracy pressure

• Thermonuclear reactions

• Electron degeneracy pressure

What happens to a massive star if gravity overcomes all other forces?

• It turns into a white dwarf

• It remains a red supergiant

• It becomes a neutron star

• It forms a black hole