Main Sequence Stars, Giants, Supergiants

What is the first stage of stellar evolution for a star like the Sun?

• Supernova stage

• Protostar stage

• White dwarf stage

• Main sequence stage

In which region of the HR diagram are the main sequence stars located?

• Red giant

• Supergiant

• Main sequence

• White dwarf

What are the characteristics of supergiants in terms of size and luminosity?

• Supergiants are medium-sized stars with average luminosities

• Supergiants are small stars with low luminosities

• Supergiants have sizes similar to the Sun and luminosities slightly greater than the Sun

• Supergiants are massive stars with sizes that can be hundreds to thousands of times larger than the Sun and luminosities that can be hundreds of thousands to millions of times greater than the Sun.

How do giants differ from supergiants in terms of size and luminosity?

• Giants are larger and less luminous than supergiants.

• Giants are smaller and more luminous than supergiants.

• Giants are smaller and less luminous than supergiants.

• Giants are larger and more luminous than supergiants.

What is the final stage of stellar evolution for a massive star?

• Formation of black hole

• Supernova explosion

• Red giant phase

• Formation of white dwarf

Where would you find supergiants on the HR diagram?

• Top right

• Bottom left

• Middle right

• Top left

What is the approximate temperature range of main sequence stars?

• 10,000 to 100,000 Kelvin

• 100 to 500 Kelvin

• 2,500 to 50,000 Kelvin

• 1,000 to 10,000 Kelvin

How do giants and supergiants compare in terms of lifespan?

• Giants have a shorter lifespan compared to supergiants.

• Giants live longer than supergiants.

• Giants and supergiants have the same lifespan.

• Supergiants have a shorter lifespan compared to giants.

What is the main source of fuel for main sequence stars?

• Carbon

• Oxygen

• Hydrogen

• Nitrogen

What happens to a star as it moves from the main sequence to the giant phase?

• It shrinks and becomes smaller, hotter, and dimmer.

• It remains the same size and temperature.

• It disappears completely.

• It expands and becomes larger, cooler, and brighter.