Concept 4 Quiz

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Describe the models that have been proposed to explain the driving mechanisms for plate motion.

This activity contains 10 questions.

	Seafloor spreading is the mechanism that has produced the floor of the Atlantic Ocean during the past 165 million years.

	True False

	The unequal distribution of heat inside Earth generates some type of thermal convection in the crust that ultimately drives plate motion.

	True False

	Slab-pull is probably the least important of all proposed mechanisms of plate motion.

	True False

	The upward motion of hot rock and mantle materials is found only at oceanic ridges.

	True False

Which of the following is not considered a mechanism for plate motion?

ridge pullridge pushslab pullslab suctionnone of the above

The circular motion of convection occurs because it is

independent of heat energydensity drivenheat and density drivenheat drivenall of the above

New oceanic crust and the lithosphere along either side of a ridge will cool and

drag across the ridgethe solid rock cannot movemove faster than most subducting slabsslide down the ridgepush upward

	Slab suction happens only as the slab reaches the trench.
	Slab suction happens only as the slab reaches the trench.
	True False

The chain of volcanic structures that extends from the Hawaiian Islands to Midway Island and then continues northward toward the Aleutian trench have formed over a ____________ as the Pacific plate moved.

volcanic island arcconvergent boundaryhot spotsubduction zonedivergent boundary

The "layer-cake" convection model indicates the source of mid-ocean ridge basalts as a result of

deep-mantle convectionupper layer convectionwhole-mantle convectionlower-layer convectionnone of the above

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Concept 4 Quiz

Seafloor spreading is the mechanism that has produced the floor of the Atlantic Ocean during the past 165 million years.

The unequal distribution of heat inside Earth generates some type of thermal convection in the crust that ultimately drives plate motion.

Slab-pull is probably the least important of all proposed mechanisms of plate motion.

The upward motion of hot rock and mantle materials is found only at oceanic ridges.

Which of the following is not considered a mechanism for plate motion?

The circular motion of convection occurs because it is

New oceanic crust and the lithosphere along either side of a ridge will cool and

Slab suction happens only as the slab reaches the trench.

The chain of volcanic structures that extends from the Hawaiian Islands to Midway Island and then continues northward toward the Aleutian trench have formed over a ____________ as the Pacific plate moved.

The "layer-cake" convection model indicates the source of mid-ocean ridge basalts as a result of