What Is Important About the Habitable Zone Around a Star

question 89

Multiple Choice

What is important about the habitable zone around a star that makes astronomers believe life could exist there

• A)The level of UV radiation from the star is minimal there.
• B)Only in the life zone can complex organic molecules be found.
• C)Planets in the life zone will always have oxygen atmospheres.
• D)In the life zone water can exist as a liquid.

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Definitions:

External Costs

Costs that are not borne by the parties to a transaction but are imposed on others, such as pollution affecting non-participants.

Output

The amount of goods or services produced by a company, industry, or economy in a given period.

Marginal Social Benefit

The additional benefit to society from one more unit of a good or service being produced and consumed.

Marginal Social Cost

The additional cost incurred by society as a whole from producing one more unit of a good or service, including both private costs and any externalities.