4.3-4.6: Plate Boundaries

The upper-most mantle, along with the overlying crust, behave as a strong, rigid layer, known as the (a)  

Beneath the lithosphere lies a weaker region in the mantle known as the (a)   .

The Earth’s lithosphere is broken into numerous segments called (a)   .

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NGSS.MS-ESS2-3

Areas where two plates move apart, resulting in upwelling of mantle material, are called (a)   .

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NGSS.MS-ESS2-3

The global (a)   is a track of elevated areas of the seafloor characterized by high heat flow and volcanism.

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NGSS.MS-ESS2-3

Along the crest of some ridge segments is a deep canyonlike structure called a (a)   .

(a)   is a mechanism that operates along the oceanic ridge system to create new seafloor.

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NGSS.MS-ESS2-3

Tectonic forces sometimes pull the crust apart and the broken crustal fragments generate an elongated depression called a (a)   .

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NGSS.MS-ESS2-3

NGSS.MS-ESS2-2

Areas where two plates move together, resulting in one plate descending beneath another, are called (a)   .

(a)   are sites at which lithosphere is being pulled back into the mantle. One plate slides and descends beneath another.

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NGSS.HS-ESS1-5

NGSS.HS-ESS2-1