The Galaxy Has Become Enriched in Heavy Elements Since It

question 56

Multiple Choice

The galaxy has become enriched in heavy elements since it formed.What is responsible for the enrichment?

• A)Nuclear reactions in interstellar clouds
• B)The infall of heavy elements from intergalactic space
• C)The transformation of cosmic rays into heavy elements
• D)Nuclear reactions in stars,followed by stellar mass loss

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Definitions:

Life-cycle Pattern

A theory suggesting that individuals plan their consumption and savings behavior over their lifetime, taking into account expected income changes and retirement needs.

Income Variation

Fluctuations in an individual's or household's income due to factors like employment changes, investment returns, or economic conditions.

Annual Income

The total amount of income received over a one year period from all sources including wages, salaries, benefits, dividends, and interest.

Total Utility

The total satisfaction or benefit a consumer receives from consuming a particular quantity of goods and services.