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- 1. Multiple Choice
The Hertzsprung-Russell (or "HR") diagram shows a scatter plot of stars'
luminosity vs. temperature.
apparent magnitude vs. temperature.
heat & color index.
- 2. Multiple Choice
The "main sequence" on the HR diagram refers to a diagonal line or field showing
the age of stars.
the size in radius of stars.
the coolest stars top left; hottest stars bottom right.
the hottest stars top left; coolest stars bottom right.
- 3. Multiple Choice
Blue giant stars are located/ plot
top left on the HR diagram.
somewhere near the top on the HR diagram.
top right on the HR diagram.
off the charts on some HR diagrams.
- 4. Multiple Choice
Stars like our Sun and Alpha Centauri A are about average in temperature and are located/plot
near the center of the main sequence.
slightly off the main sequence in the lower left.
towards the lower right of the main sequence.
near the red dwarf part of the HR diagram.
- 5. Multiple Choice
90% of the stars are __________ stars .
white dwarf
supergiant
main sequence
red giant
- 6. Multiple Choice
What is measured on the y-axis of an HR Diagram?
luminosity
color
location
temperature
- 7. Multiple Choice
What is measured on the x-axis of an HR Diagram?
luminosity
brightness
location
temperature
- 8. Multiple Choice
What kind of stars have low luminosity and low temperature?
main sequence
blue giants
white dwarfs
red supergiants
- 9. Multiple Choice
What kind of stars have high luminosity and low temperature?
main sequence
blue giants
white dwarfs
red supergiants
- 10. Multiple Choice
What kind of stars have low luminosity and high temperature?
main sequence
blue giants
white dwarfs
red supergiants
- 11. Multiple Choice
What kind of stars have high luminosity and high temperature?
main sequence
blue giants
white dwarfs
red supergiants
- 12. Multiple Choice
What color are the hottest stars?
yellow
white
red
blue
- 13. Multiple Choice
What color are the coolest stars?
yellow
white
red
blue
- 14. Multiple Choice
What color of star is our Sun?
white
yellow
red
blue
- 15. Multiple Choice
The hottest stars are located farthest to the ___________?
right
left
- 16. Multiple Choice
The dimmest stars are located ___________?
closer to the top
closer to the bottom
- 17. Multiple Choice
What color would a star be if its temperature is 20,000 K and its luminosity is 106?
blue
white
yellow
orange
red
- 18. Multiple Choice
What type of star has a temperature of 2500 K and a luminosity of 105?
blue giants
main sequence
red supergiants
main sequence
- 19. Multiple Choice
According to the HR Diagram, the Sun is an average star with average luminosity. Why does is appear to be so much brighter than the other stars in the sky?
Because of the halo effect
Because it is hotter than the other stars
Because it is closer to Earth than the other stars
Because the moon helps reflect its light and makes it look brighterr
- 20. Multiple Choice
List the color of the stars from coldest to hottest.
blue, white, yellow, orange, red
red, orange, yellow, white, blue
- Answer choicesTagsAnswer choicesTags