Exploring the Cosmos - Degree Exam 2009 - Life and Death of Stars (Part 2)
1. Stars in the same cluster differ widely in
mass
distance
chemical composition
age
2. A globular cluster in our Galaxy is
a group of very young stars.
an asterism like the Pleiades.
a group of very old stars.
a constellation such as Orion.
3. Stars of ten times the solar mass
burn out more quickly than the Sun.
are more common than stars like the Sun.
shine for longer than the Sun.
are only found in globular clusters.
4. Interstellar gas is
of little importance astronomically.
mostly hydrogen.
all at a temperature close to absolute zero.
mostly carbon monoxide.
5. The Chandrasekhar limit is
around ten times the solar mass.
the maximum radius of a red giant.
the radius of a black hole.
the maximum mass of a white dwarf.
6. A red giant
is hotter than a white dwarf.
looks very large through a telescope.
fuses hydrogen in its core.
is a stage in the life of our Sun.
7. The CNO cycle is a nuclear reaction which
occurs mainly in stars with cores hotter than the Sun.
causes the helium flash.
produces 'metals'.
occurs mainly in carbon white dwarfs.
8. The Crab Nebula is of interest because it
surrounds the supernova SN1987A.
contains a pulsar.
contains a black hole.
is in the centre of the constellation Cancer.
9. Pulsars are
very large stars.
rotating white dwarfs.
stars that periodically expand and contract.
rotating neutron stars.
10. The final state of a star depends on its
degeneracy
chemical composition
mass
magnitude
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