All of the Following Are Differences Between MORBs and OIBs

question 22

Multiple Choice

All of the following are differences between MORBs and OIBs EXCEPT:

• A) MORBs are composed of basalts, and OIBs are composed of gabbros.
• B) MORBs probably formed from partial melting of the upper mantle, and OIBs probably formed from a deep part of the mantle.
• C) MORBs contain less potassium and uranium than OIBs.
• D) MORBs occur at divergent plate boundaries, and OIBs occur over hot spots.

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Definitions:

Opportunity Cost

The expense incurred by not choosing the next most favorable option when a decision is made or one possibility is selected over another.

Transaction Costs

The time, effort, and other resources needed to search out, negotiate, and complete an exchange.

Price Ceiling

A legally established maximum price for goods or services, intended to protect consumers from excessively high prices.

Market Equilibrium

A condition in which market supply equals market demand, and the price of the good or service stabilizes.