Exploring the Cosmos - Degree Exam 2011 - Life and Death of Stars (Part 2)
1. Which of the following is Betelgeuse?
A star
A cluster
A nova
A constellation
2. The Hertzprung-Russell diagram relates which two properties of a star?
Luminosity and temperature
Luminosity and time
Time and distance
Time and temperature
3. The surface temperature of a type G2 star is about what?
5 800 K
820 K
58 000 K
8 200 K
4. If the core temperature of a main sequence star increases, what happens to it?
The star expands and cools.
The star shrinks and heats.
The star shrinks and cools.
The star expands and heats.
5. Which of the following tends to escape the core of a star?
Positrons
Protons
Neutrinos
Neutrons
6. A planetary nebula is associated with which of the following?
Supernovae
Asteroids
White dwarfs
Red giants
7. The light curve of a type-II supernova has
H-lines and a plateau.
no 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.
caused by electrons being fermions.
the minimum mass of a black hole.
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
novae
black holes
supernovae
pulsars
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