Quiz on Stellar Properties

Which property best indicates a star's surface temperature?

• Mass

• Color

• Age

• Distance from Earth

What percentage of a main sequence star's composition is typically hydrogen?

• 25%

• 50%

• 70%

• 90%

What is the primary component of nebulae from which stars form?

• Dark matter

• Interstellar gas and dust

• Plasma fields

• Solar wind particles

Which force primarily causes a nebula to begin collapsing into a protostar?

• Electromagnetic force

• Nuclear fusion

• Gravitational force

• Centripetal force

What is the primary factor that determines a star's evolution and lifetime?

• Surface temperature

• Mass

• Distance from Earth

• Color

How does a star's mass affect its fusion rate?

• Higher mass leads to slower fusion

• Mass has no effect on fusion rate

• Higher mass leads to faster fusion

• Only intermediate mass affects fusion

What is the primary factor that determines a star's eventual fate at the end of its life?

• The star's temperature

• The star's initial mass

• The star's luminosity

• The star's age

What is the fate of a main sequence star with a mass similar to our Sun?

• Black hole

• Neutron star

• White dwarf

• Red giant

What is the primary use of spectroscopy in studying celestial objects?

• To measure their mass directly

• To determine their chemical composition, temperature, and motion

• To calculate their exact distance from Earth

• To photograph their surface features

The Doppler effect in spectroscopy helps astronomers determine:

• The chemical composition of stars

• The surface temperature of planets

• The relative motion of celestial objects

• The age of galaxies