Life cycle of a star/HR diagram

What is the difference between a Red Giant and a Supergiant?

• Supergiants are smaller and less luminous than Red Giants.

• Supergiants are larger and more luminous than Red Giants.

• Red Giants are hotter than Supergiants.

• Red Giants are the largest stars in the universe.

What is the Main Sequence phase of a star?

• The phase where a star fuses hydrogen into helium in its core.

• The phase where a star begins to cool and expand into a red giant.

• The phase where a star collapses into a black hole after exhausting its fuel.

• The phase where a star forms from a cloud of gas and dust.

What happens during the Red Giant phase?

• The star collapses into a black hole.

• The star expands its outer layers, increasing in size and luminosity.

• The star's core cools down and stops nuclear fusion.

• The star becomes a white dwarf and dims significantly.

What is the significance of a star's color?

• A star's color indicates its temperature; blue stars are the hottest, while red stars are the coolest.

• A star's color determines its size; larger stars appear red, while smaller stars appear blue.

• A star's color reflects its age; younger stars are typically red, while older stars are blue.

• A star's color has no significance and is purely aesthetic.

What is a White Dwarf?

• A type of star that is still undergoing nuclear fusion.

• A remnant core of a star that has exhausted its nuclear fuel and shed its outer layers.

• A large, luminous star that is in the main sequence phase.

• A planet that orbits a star in the habitable zone.

What does the HR Diagram represent?

• A scatter plot of stars showing the relationship between their absolute magnitudes and stellar classifications.

• A diagram illustrating the lifecycle of stars from birth to death.

• A chart that categorizes stars based on their color and temperature.

• A graph that compares the brightness of stars in different galaxies.

What is the life cycle of a star?

• Nebula, Protostar, Main Sequence, Red Giant, and White Dwarf

• Nebula, Red Giant, Supernova, and Black Hole

• Protostar, Main Sequence, Red Giant, and Neutron Star

• Nebula, Main Sequence, Red Giant, and Planetary Nebula

What is fusion in the context of stars?

• A process where stars lose energy by splitting heavier atomic nuclei into lighter ones.

• A method of cooling stars by dispersing their energy into space.

• The process by which stars generate energy by combining lighter atomic nuclei into heavier ones, such as hydrogen into helium.

• A technique used by stars to create black holes from their mass.

What is a Black Hole?

• A region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

• A celestial body that emits light and heat due to nuclear fusion.

• A massive star that has exploded in a supernova event.

• A theoretical object that exists only in mathematical equations.

What is a Nebula?

• A giant cloud of dust and gas in space, where stars are born.

• A type of star that has exploded.

• A planet that is in the process of forming.

• A black hole that consumes everything around it.