The Outer Core of Earth Is Molten, but the Inner

question 28

Multiple Choice

The outer core of Earth is molten, but the inner core is solid. The reason is that the

• A) inner core has a different composition than the outer core, with a higher melting point.
• B) lower pressure in the inner core allows the material to freeze out of the molten rock.
• C) melting point of the iron-nickel mixture is raised above the actual temperature by the extremely high pressure.
• D) temperature is lower in the inner core than in the surrounding region.

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Definitions:

Consumer Surplus

The deviation between the full cost that consumers are willing and are financially suitable to pay for a product or service, and the cost they ultimately pay.

Individual Consumer Surplus

The net gain to an individual buyer from the purchase of a good; equal to the difference between the buyer’s willingness to pay and the price paid.

Selling Haircuts

The commercial activity of providing hair cutting and styling services to customers for a fee.

Efficiency

The degree to which resources are allocated in a way that maximizes productivity and minimizes waste or inefficiency.