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Stellar Evolution Quiz

Picture


1 Low mass stars
  • Have shorter lifespan
  • Remain outside the main sequence
  • Are relatively cold in temperature


2. A brown dwarf is
  • The smallest type of star
  • End-stage of a white dwarf
  • An object too small to begin nuclear fusion


3. When our sun was a proto star it,
  • Produced energy through hydrogen fusion
  • Was more luminous than present
  • Was in the main sequence


4.T-Tauri stars are
  • A type of main sequence stars
  • Produce intense x-ray emissions
  • Have begun hydrogen fusion


5.The H-R diagram was created by
  • Ejnar Hertzsprung and Henry Russell
  • Edwin Hubble and David Reynolds
  • Eugene Hertz and Martin Rees


6.H-R diagram classifies stars according to
  • Visual magnitude and Spectral class
  • Absolute magnitude and Stellar mass
  • Stellar luminosity and Spectral class


7.When a star, the size of our sun dies, it will become,
  • A black hole
  • A neutron star
  • A white dwarf


8.The TRUE statement about Massive stars
  • Cannot have more than 120 solar masses
  • End up as white dwarfs
  • Not included in the H-R diagram


9. WRONG statement about white dwarfs?
  • Has a similar volume to Earth
  • Produce energy through nuclear fusion
  • Majority of stars in our galaxy will end up as white dwarfs


10. Black dwarfs
  • Were first discovered in a binary system
  • Are larger than brown dwarfs
  • Our sun will eventually end up as a black dwarf


11. Neutron stars
  • Composed entirely of neutrons
  • Are well below the Chandrasekhar limit
  • Have slow rotational speeds


12. Which of these statements is TRUE about black holes?
  • Only light can escape inside the event horizon
  • It is smaller than the Schwarzschild radius
  • Does not emit any radiation


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