The Lithosphere Rides on Top of the Asthenosphere

question 59

Multiple Choice

The lithosphere rides on top of the asthenosphere.Lithospheric movement causes

• A)earthquakes,volcanic activity,and mountain building activity.
• B)the subduction of continental crust under oceanic crust.
• C)hot-spot activity as found in Hawaii.
• D)widespread destruction.

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Definitions:

Pectoralis Major

A large muscle in the chest that, when contracted, causes the arm to move across the body.

Upper Back

The region of the back that extends from the base of the neck to the bottom of the ribcage, involving several muscles and the thoracic spine.

Trapezius

A large superficial muscle that extends from the occipital bone to the lower thoracic vertebrae and to the scapula, functioning to move the shoulder blade and support the arm.

Levator Scapulae

A skeletal muscle situated at the back and side of the neck, responsible for elevating the scapula (shoulder blade).