Exploring the Cosmos - Class Test 2 - Life and Death of Stars (Part 2)
1. Globular clusters in our galaxy consist of groups of
very old stars.
burnt out stars.
very large stars.
newly born stars.
2. An open cluster consists of stars which are all
the same mass.
the same temperature.
on the main sequence.
around the same age.
3. Which of the following elements makes up a large fraction of a main sequence star?
Oxygen
Carbon
Iron
Helium
4. T Tauri stars are
standard candles.
frequently strong infrared sources.
optically visible in their cocoon.
remnant cores of dead stars.
5. The Sun generates heat by converting
hydrogen to helium through the proton-proton chain.
hydrogen to helium through the triple alpha reaction.
helium to carbon through the CNO cycle.
helium to carbon through the triple alpha reaction.
6. Main sequence stars with higher luminosity than the Sun
must be red giants.
have a shorter lifetime than the Sun.
have a lower surface temperature than the Sun.
are only observed in globular clusters.
7. Globular clusters mainly consist of groups of
black holes.
very old stars.
newly born stars.
very large stars.
8. T Tauri stars are
remnant cores of dead stars.
standard candles.
frequently strong infrared sources.
optically visible in their cocoon.
9. Open clusters
contain the oldest stars in our galaxy.
are only found in distant galaxies.
are metal poor.
have a smaller density of stars than globular clusters.
10. Stars in a single cluster differ widely in
distance.
chemical composition.
age.
mass.
11. Bok globules are
dense dust clouds out of which stars form.
small star clusters.
T Tauri stars.
Herbig Haro objects.
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