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