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- 1. Multiple Choice
Consider the color of the sun. Based on this color, what is the sun's approximate surface temperature?
10,000-30,000
6000-7500
30000-60000
<3500
- 2. Multiple Choice
Which statement best describes stars?
large planets that are composed mostly of gases
celestial bodies made of gas that give off light
faint dots of light that can be seen from Earth's surface
objects that form in the outer parts of the solar system
- 3. Multiple Choice
Felix examined several photos of stars. To compare their temperatures, he looked at the colors of the stars. He organized the photos in order from coolest to hottest. Which of these answers shows the correct order?
red, yellow, white, blue
white, blue, yellow, red
yellow, white, blue, red
blue, yellow, white, red
- 4. Multiple Choice
Which of the following statements best relates a star’s color to its surface temperature?
blue stars have a relatively low temperature
red stars have a relatively high temperature
blue-white stars have a relatively low temperature
yellow stars have a relatively low temperature
- 5. Multiple Choice
Based on evidence in the table, which star would appear the dimmest from Earth’s surface?
Star A
Star B
Star C
Star D
- 6. Multiple Choice
A scientist discovers a new star. It is blue-white and is about 20,000 K. Which star is it most similar to?
Sun
Rigel
Vega
Canopus
- 7. Multiple Choice
Absolute magnitude is defined as…
mass of a star
color of a star
brightness of a star, as it appears from Earth
brightness of a star independent from the distance of Earth
- 8. Multiple Choice
About 90 percent of the stars in the universe, including the sun, are main sequence stars. What do all main sequence stars have in common?
All main sequence stars are yellow like our sun.
All main sequence stars are as bright as our sun.
They are all undergoing fusion of helium into carbon within their cores
They are undergoing fusion of hydrogen into helium within their cores
- 9. Multiple Choice
Which of the following correctly ranks astronomical objects by size, starting with the smallest?
earth, sun, solar system, galaxy, universe
sun, solar system, earth, universe, galaxy
universe, galaxy, solar system, earth, sun
solar system, earth, sun, universe, galaxy
- 10. Multiple Choice
On an HR diagram, stars at the same temperature are found...
aligned horizontally (next to each other)
aligned vertically (one above the other)
along the main sequence
spread through the diagram
- 11. Multiple Choice
White dwarfs stars are
hot and dim
cool and dim
hot and bright
cool and bright
- 12. Multiple ChoiceWhich of the following is NOT a characteristic used to classify stars?ColorTemperatureSizeShape
- 13. Multiple ChoiceThe brightness of a star as seen from earth is defined as:Apparent BrightnessAbsolute BrightnessBrightnessCandid Brightness
- 14. Multiple ChoiceA light year is a measurement of:TimeDistanceGravityNone of the Above
- 15. Multiple ChoiceExplosion of a high-mass star.White DwarfPlanetary NebulaSupernovaNeutron Star
- 16. Multiple ChoiceAn object whose gravity is so strong that nothing can escape.Planetary NebulaSupernovaNeutron StarBlack Hole
- 17. Multiple ChoiceWhich of the following is a name used for stars:NeutronSupergiantWhite dwarfAll of the above
- 18. Multiple Choice
Stars are made of mostly which two gases?
Hydrogen and Helium
Hydrogen and Oxygen
Hydrogen and Nitrogen
Hydrogen and Carbon
- 19. Multiple Choice
A star is born in a cloud of gas and dust called a __________.
nebula
galaxy
asteroid
black hole
- 20. Multiple Choice
Stars give off heat and light in a process called ___________.
nuclear fusion
supernova
luminosity
spectroscopy
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