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Stellar Evolution Quiz
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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