Stars: Birth, Life, and Death

What is the process by which stars are formed?

• Chemical reaction

• Stellar nucleosynthesis

• Nuclear fission

• Photosynthesis

What is the life cycle of a star?

• Formation, main sequence, red dwarf, planetary nebula, black hole

• Nebula, main sequence, red giant, planetary nebula, white dwarf

• Formation, main sequence, red giant, black hole, white dwarf

• Formation, main sequence, red giant, planetary nebula, white dwarf or supernova

What is the main source of energy in stars?

• gravitational pull

• solar radiation

• chemical reactions

• nuclear fusion

What happens when a star goes supernova?

• The star transforms into a white dwarf.

• The star undergoes a catastrophic explosion, releasing an enormous amount of energy and creating a bright burst of light.

• The star collapses into a black hole.

• The star becomes a red giant.

What is a black hole?

• A black hole is a region in space where gravity is so strong that nothing, not even light, can escape its pull.

• A black hole is a region in space where gravity is so weak that nothing, not even matter, can escape its pull.

• A black hole is a region in space where gravity is so strong that only light can escape its pull.

• A black hole is a region in space where gravity is so weak that everything, including light, can escape its pull.

What is the first stage in the life cycle of a star?

• protostar

• white dwarf

• main sequence

• supernova

What is the final stage in the life cycle of a large star?

• supernova

• nebula

• black hole

• white dwarf

What is the process by which stars produce energy?

• chemical reaction

• nuclear fission

• nuclear fusion

• gravitational collapse

What is the result of a massive star collapsing under its own gravity?

• black hole formation

• supernova explosion

• neutron star formation

• planetary nebula formation

What is the name given to the remnants of a massive star after a supernova?

• red giant

• neutron star or black hole

• white dwarf

• brown dwarf