The Spectra of Interstellar Gas Clouds Show That They Have

question 30

Multiple Choice

The spectra of interstellar gas clouds show that they have the same basic composition as:

• A)interstellar dust.
• B)Earth's atmosphere.
• C)stars.
• D)asteroids.
• E)the Martian polar caps.

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Definitions:

Gains From Trade

The benefits that parties obtain from engaging in voluntary exchange of goods or services.

Free Markets

Economic systems where prices for goods and services are determined by the open market and consumers, with minimal government intervention.

Opportunity Costs

The cost of foregone alternatives, or what is given up to engage in one activity instead of another.

Efficiency

The extent to which resources are used optimally to achieve a specific outcome with minimal waste.