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