Stars and Their Life Cycle

What primarily makes up stars?

• Carbon and iron

• Oxygen and nitrogen

• Hydrogen and helium

• Silicon and magnesium

What is the main process that powers stars?

• Gravitational collapse

• Nuclear fusion

• Thermal expansion

• Chemical reactions

What happens to a star when it runs out of hydrogen?

• It turns into a neutron star

• It remains a main sequence star

• It becomes a red giant

• It becomes a black hole

What is the Hertzsprung-Russell diagram used for?

• Classifying stars

• Measuring distances in space

• Tracking star movements

• Identifying planets

What is a white dwarf?

• A star in its main sequence

• A type of supernova

• A small, dense star

• A massive star

What is the fate of a massive star after it becomes a red giant?

• It becomes a white dwarf

• It explodes as a supernova

• It remains stable

• It turns into a black dwarf

What do astronomers use supernova for?

• To measure time

• As standard candles for measuring distances

• To identify black holes

• To predict star births

What are constellations used for?

• Measuring star brightness

• Tracking weather patterns

• Navigational tools

• Naming planets

What is a red giant?

• A star that has expanded and cooled

• A type of neutron star

• A dying star that will become a black hole

• A star in its main sequence

What is the primary component of the Earth's sun?

• Carbon

• Helium

• Hydrogen

• Oxygen