Long-Lasting Spiral Density Waves Occur in the Disk of a Spiral

question 55

Multiple Choice

Long-lasting spiral density waves occur in the disk of a spiral galaxy when:

• A) the spiral merges with another galaxy
• B) the galaxy is too close
• C) the galaxy's disk is regularly disturbed
• D) none of the above

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Definitions:

Personality Traits

Enduring characteristics that describe an individual's behavior, attitude, and emotions.

Individual Differences

Variations among people in their thinking, emotion, personality, and behavior.

Visibility

The degree to which actions, decisions, or processes are observable, transparent, and open to scrutiny by outside parties.

Centrality

The importance or influence of a node within a network, indicating how vital a point is within the structure.