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:

Control

In an experiment or study, the standard to which comparisons are made; in management, the process of directing and regulating processes, systems, or organizations.

Net Investment

The aggregate investment in new capital assets less the depreciation charges on the current capital assets.

Gross Investment

The total amount spent on purchases of new capital and on replacing depreciated capital within an economy during a specific period.

Depreciation

The process by which the value of an asset decreases over time, often due to wear and tear or obsolescence.