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