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Asymptotic giant branch: Quiz

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Question 1: When a star exhausts the supply of ________ by nuclear fusion processes in its core, the core contracts and its temperature increases, causing the outer layers of the star to expand and cool.
HeliumHydrogenOxygenNitrogen

Question 2: This is a period of ________ undertaken by all low to intermediate mass stars (0.6–10 solar masses) late in their life.
Stellar evolutionNeutron starSupernovaWhite dwarf

Question 3: Subsequent dredge-ups can lead to the formation of ________.
MetallicitySupernovaStellar classificationCarbon star

Question 4: Observationally, an asymptotic giant branch (AGB) star will appear as a ________.
Red giantMain sequenceSupernovaStellar evolution

Question 5: The stars radius may become as large as one ________.
SunAstronomical unitSolar SystemLight-year

Question 6: The star's luminosity increases greatly, and it becomes a ________, following a track leading into the upper-right hand corner of the HR diagram.
Red giantStellar evolutionMain sequenceSupernova

Question 7: Eventually, once the temperature in the core has reached approximately 3x108K, ________ burning begins.
NitrogenHeliumOxygenHydrogen

Question 8: During the E-AGB phase the main source of energy is helium fusion in a shell around a core consisting mostly of ________ and oxygen.
AluminiumCarbonUraniumGold

Question 9: This is the horizontal branch (for population II stars) or red clump (for ________).
SupernovaWhite dwarfMetallicityStellar classification

Question 10: The asymptotic giant branch is the region of the ________ populated by evolving low to medium-mass stars.
Hertzsprung–Russell diagramMain sequenceStellar classificationBinary star







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