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Our universe
Con il contributo di: Collins
  • 1. Absolute magnitude is the brightness of a star measured from ...
A) where it is
B) 1,000,000 km away
C) a stardard distance from earth
D) 1 light year away from earth
  • 2. Apparent magnitude how bright a star is measured from....
A) 1 light year way from earth
B) 1,000,000 km away
C) a stardard distance from earth
D) where it is
  • 3. What is the apparent magnitude of the sun?
A) -47
B) 7
C) 0
D) -27
  • 4. What is the apparent magnitude of the moon?
A) 0
B) -24
C) 14
D) -13
  • 5. What is the apparent magnitude of mars?
A) -3
B) 0
C) 3
D) -14
  • 6. What is the apparent magnitude of venus
A) -2
B) 2
C) -5
D) 0
  • 7. What is the apparent magnitude of the faintest object to the naked eye under perfect conditions?
A) 9.5
B) -.24
C) -2.8
D) 6.5
  • 8. What is the absolute magnitude of the sun?
A) 5
B) 25
C) -15
D) -25
  • 9. What relationship does the Hertzsprung-Russell diagram show?
A) The color and temperature of the stars
B) The brightness and color of stars
C) temperature and brightness of stars
D) All of the answers are correct
  • 10. What type of star is the sun on the Hertzsprung-Russell diagram?
A) super giant
B) main sequence
C) white dwarf
D) giant
  • 11. How are heat and color of a star related?
A) yellow stars are the hottest
B) blue stars are the hottest
C) White stars are the hottest
D) red stars are the hottest
  • 12. How are heat and color of a star related?
A) white stars are the coolest
B) yellow stars are the coolest
C) blue stars are the coolest
D) red stars are the coolest
  • 13. Most stars.....
A) are main sequence stars
B) will become a black hole
C) will become a Nebula
D) will explode into a Nova or Super Nova
  • 14. A white dwarf is....
A) a start that has exploded
B) a extremely dense mass that no light can escape from
C) a cloud of gasses
D) None of the answers are correct
  • 15. Which of the following is NOT a type of galaxy?
A) spiral
B) conical
C) elliptical
D) irregular
  • 16. What is the closest major galaxy to ours?
A) Crab Nebula
B) Andromeda
C) Alpha Centuari
D) Hercules
  • 17. The Big Bang Theory explains....
A) the formation of the universe
B) how the sound travels through space
C) how long it will take to travel in space
D) how stars explode
  • 18. Astronomers think the universe is about...
A) 1 billion years old
B) 14 billion years old
C) 4 billion years old
D) 100 million years old
  • 19. Is the universe "open" or "close"
A) It is not known at this time.
B) It is open.
C) It is closed.
  • 20. When "red shift" occurs....
A) objects are moving away from you
B) Objects are stationary.
C) Objects are moving toward you.
D) Red stars are moving toward you.
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