What Would You Study in Order to Determine the Timescale

question 22

Multiple Choice

What would you study in order to determine the timescale on which the Earth's magnetic field reverses direction?

• A) a spreading center on the sea floor
• B) a volcano in the middle of a continental plate
• C) a fault at the border between two plates
• D) a subduction zone on the sea floor
• E) the rate of motion of tectonic plates

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Definitions:

Regenerated

describes something that has been restored or replenished, often relating to natural processes or materials that have been recycled or renewed.

Phagocytosis

The process by which cells engulf and digest foreign particles or microorganisms, an essential part of the immune system.

Pinocytosis

The process whereby a cell engulfs large amounts of liquid.

Active Transport

The movement of molecules across a cell membrane from a region of lower concentration to one of higher concentration, requiring energy.