Exploring the Cosmos - Degree Exam 2011 - Life and Death of Stars (Part 2)
1. Which of the following is Betelgeuse?
A cluster
A nova
A constellation
A star
2. The Hertzprung-Russell diagram relates which two properties of a star?
Luminosity and temperature
Time and temperature
Luminosity and time
Time and distance
3. The surface temperature of a type G2 star is about what?
5 800 K
58 000 K
8 200 K
820 K
4. If the core temperature of a main sequence star increases, what happens to it?
The star expands and heats.
The star expands and cools.
The star shrinks and heats.
The star shrinks and cools.
5. Which of the following tends to escape the core of a star?
Neutrinos
Positrons
Neutrons
Protons
6. A planetary nebula is associated with which of the following?
White dwarfs
Supernovae
Asteroids
Red giants
7. The light curve of a type-II supernova has
no H-lines and a plateau.
no H-lines and no plateau.
H-lines and no plateau.
H-lines and a plateau.
8. The Chandrasekhar limit is
caused by electrons being fermions.
due to boson degeneracy.
2.8 solar masses
the minimum mass of a black hole.
9. Neutron stars are approximately as dense as which of the following?
The mass of the Sun squashed into the volume of the Earth.
The mass of the Earth squashed into a thimble.
A mountain squashed into a thimble.
Water
10. Jocelyn Bell-Burnell discovered
black holes
novae
supernovae
pulsars
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