The Boundary in the Mantle Where Composition Changes Allows Seismic

question 16

Multiple Choice

The boundary in the mantle where composition changes allows seismic wave velocities to do what because pressure is great enough that the minerals in the mantle recrystallize to form denser minerals such as peridotite is called the 660-kilometer discontinuity.

• A) Velocity decreases
• B) Velocity increases
• C) Velocity remains the same
• D) None of the above

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Definitions:

Rumination

A focused attention on the symptoms of one's distress, and its possible causes and consequences, rather than its solutions.

Self-Control

The ability to regulate one's emotions, thoughts, and behaviors in face of temptations and impulses.

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The concentration of progesterone, a hormone important for the regulation of menstruation and pregnancy, in the bloodstream.

Type D Personality

A personality trait marked by significant negative emotions and a tendency towards avoiding social interactions.