Linear, Magnetic Patterns Associated with Mid- Ocean Ridges Are Configured

question 19

Multiple Choice

Linear, magnetic patterns associated with mid- ocean ridges are configured as_______ .

• A)normal and reversed magnetized strips roughly parallel to the ridge
• B)reversed magnetizations along the rift valleys and normal magnetizations along the ridge
• C)concentric circles about a rising plume of hot mantle rocks and magma
• D)normal and reversed magnetized strips roughly perpendicular to the ridge axis

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Definitions:

PNS

The Peripheral Nervous System, which includes all the nerves that lie outside the brain and spinal cord.

Reticular Formation

Midbrain area in which nuclei and fiber pathways are mixed, producing a netlike appearance; associated with sleep–wake behavior and behavioral arousal; also called the reticular activating system (RAS).

Sleep

A naturally recurring state of mind and body characterized by altered consciousness, relatively inhibited sensory activity, and inhibition of nearly all voluntary muscles.

Orienting Responses

The instinctive redirection of attention toward a new or important stimulus, often involving physical positioning toward the stimulus.