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