You Observed Three Different Star Clusters and Found That the Main-Sequence

question 21

Multiple Choice

You observed three different star clusters and found that the main-sequence turnoff stars in cluster 1 had spectral type A,the main-sequence turnoff stars in cluster 2 had spectral type B,and the main-sequence turnoff stars in cluster 3 had spectral type G.Which star cluster is the oldest?

• A) cluster 1
• B) cluster 2
• C) cluster 3
• D) It is impossible to determine their ages given only the spectral types.

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Definitions:

Referent Power

Referent power is the capacity to influence other people because of their desire to identify personally with you.

Group Pressures

The social influence exerted by peers or a group to encourage an individual to conform to the group’s norms and expectations.

Force-Coercion Strategy

Pursues change through formal authority and/or the use of rewards or punishments.

Political Alliances

Partnerships or associations formed between political entities, such as countries or parties, to advance shared goals or interests.