How Do We Know That Halo Stars Are Older,on Average,than

question 74

Multiple Choice

How do we know that halo stars are older,on average,than disk stars?

• A)Halo stars orbit in random directions but disk stars have more ordered orbits.
• B)There are no blue halo stars.
• C)There are no red disk stars.
• D)Theories of galaxy formation tell us that the halo formed earlier than the disk.
• E)We see evidence for new stars forming in the disk today.

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Definitions:

Threats of Punishment

A behavioral strategy that involves warning of negative consequences to discourage undesirable actions or behaviors.

Promised Rewards

Incentives that are offered in advance to motivate individuals to engage in a specific behavior or achieve a certain outcome.

Achievement Motivation

The drive to pursue and meet goals or standards of excellence through one's efforts.

Ambitious Long-Term Goal

A challenging and far-reaching objective that requires extensive time and effort to achieve.