Life Cycle of Stars

What is the initial stage of a star's formation called?

• Red Giant

• Protostar

• White Dwarf

• Black Hole

What process makes a star hot enough to begin its life?

• Nuclear fission

• Chemical reaction

• Nuclear fusion

• Gravitational repulsion

What forces are balanced in a main sequence star?

• Magnetic force and electric force

• Outward pressure from fusion and inward force of gravity

• Solar wind and atmospheric pressure

• Centrifugal force and centripetal force

How long can a star remain in its main sequence stage?

• Thousands of years

• Millions to billions of years

• A few hundred years

• Trillions of years

What happens to a small star when its hydrogen fuel begins to run out?

• It shrinks into a black hole

• It becomes a white dwarf immediately

• It expands into a Red Giant

• It explodes into a supernova

What will happen to the inner planets when our Sun becomes a Red Giant?

• They will move to new orbits

• They will be engulfed by the Sun

• They will become new stars

• They will freeze solid

What is the next stage after a Red Giant collapses?

• Neutron Star

• Black Hole

• White Dwarf

• Protostar

What is the final stage of a small star's life cycle, after it stops releasing heat?

• Red Giant

• Neutron Star

• Black Dwarf

• Supernova

What is the name of the powerful explosion that occurs when a massive star collapses?

• Nebula burst

• Stellar flare

• Supernova

• Cosmic implosion

What two celestial objects can be formed after a supernova of a massive star?

• White Dwarf and Red Giant

• Protostar and Stellar Nebula

• Neutron Star and Black Hole

• Planetary Nebula and Brown Dwarf