A "Mystery" in Our Understanding of Plate Tectonics Has Been

question 29

Multiple Choice

A "mystery" in our understanding of plate tectonics has been, until recently, the nature of the power source capable of moving the plates and the continents embedded within them. Recent evidence indicates the power source to be:

• A) the readjustment of the surface to continual shrinking of the whole Earth.
• B) convection currents within the Earth's mantle is moving the plates.
• C) the action of ocean currents is dragging along the seafloor, causing the seafloor and the continents to move.
• D) the continual vibration from earthquakes and volcanoes slowly moves the continents equatorward under the influence of centrifugal force.

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Definitions:

Worldwide Evaluation

The assessment or judgment of something considering global standards or contexts.

Comparative Methods

Research techniques that involve comparing elements from different systems, or different points in time, to understand their function or development.

Forced Distribution

A method of performance evaluation where employees are ranked in groups, and each group is limited to a certain percentage of the workforce.

Critical Incident Diaries

A method for recording and analyzing significant occurrences to improve decision-making and problem-solving in organizations.