Plate Tectonics

Due to the nature of what is occurring there, a divergent boundary is also called

• A transform margin
• A constructive margin
• A destructive margin
• A subduction zone

At a transform boundary

• new oceanic crust is formed
• oceanic lithosphere is destroyed
• lithosphere is neither destroyed nor producted
• new continental crust is formed

Which of the following does NOT occur at a subduction zone?

• Oceanic crust is pushed down into the mantle
• One oceanic plate moves beneath another oceanic plate
• The leading edges of both plates are bent upwards to form mountains
• A continental plate moves over an oceanic plate

According to the plate tectonics model, what layer is made of the outer rigid crust and upper mantle?

• the mantle
• the asthenosphere
• the lithosphere
• the biosphere

Oceanic lithosphere is destroyed at

• transform fault boundaries
• divergent boundaries
• convergent boundaries
• ocean ridges

New ocean crust is formed at___

• continental volcanic arcs
• divergent boundaries
• convergent boundaries
• transform boundaries

A subduction zone is otherwise known as

• a divergent constructive margin
• a convergent constructive margin
• a divergent destructive margin
• a convergent destructive margin

Under sea volcanoes, ridges and a rift valley would be found at___

• a transform boundary
• a subduction zone
• a convergent boundary
• a divergent boundary

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