Evidence of Past Water on Mars Comes from Each of These

question 6

Multiple Choice

Evidence of past water on Mars comes from each of these EXCEPT

• A) polygon-shaped cracks in rocks.
• B) dried-up lakebeds and riverbeds.
• C) the presence of small, round hematite rocks.
• D) observation of water-rich bodies striking the planet, implying more of them did so in the past.

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Definitions:

Market Power

The ability of a producer to raise prices.

Externalities

External benefits and external costs.

Public Goods

Goods that are non-excludable and non-rivalrous, meaning individuals cannot be effectively excluded from use, and where use by one individual does not reduce availability to others.

Consumer Surplus

The difference between the total amount consumers are willing and able to pay for a good or service and the total amount they actually pay.