Oceanic Continental Convergent Plate Boundaries

What is the average rate at which the Nazca Plate is moving towards the South American Plate?

• 50 mm per year

• 79 mm per year

• 100 mm per year

• 120 mm per year

What geological feature is formed at the surface where the Nazca Plate is subducted beneath the South American Plate?

• Mid-Atlantic Ridge

• Mariana Trench

• Peru-Chile Trench

• Himalayan Mountains

What is the process called when one tectonic plate is forced down into the mantle beneath another plate?

• Divergence

• Convection

• Subduction

• Erosion

What type of earthquakes are commonly associated with the subduction of the Nazca Plate?

• Deep focus earthquakes

• Shallow focus earthquakes

• Surface earthquakes

• Volcanic earthquakes

What is the name of the zone where earthquake foci deepen as the oceanic plate descends?

• Richter zone

• Benioff zone

• Seismic zone

• Fault zone

What happens to some of the sediments and ocean crust as the Nazca Plate is subducted?

• They are melted and form magma

• They are scraped off and forced upwards

• They dissolve in seawater

• They remain unchanged

Which of the following best describes the lithosphere of the Nazca Plate compared to the South American Plate?

• Less dense and more buoyant

• Denser and less buoyant

• Equal in density and buoyancy

• More elastic and flexible

What is the primary cause of the friction between the Nazca Plate and the South American Plate?

• Ocean currents

• Wind patterns

• Plate tectonic movement

• Volcanic activity

In which direction is the Nazca Plate moving relative to the South American Plate?

• Westwards

• Northwards

• Eastwards

• Southwards

What is the primary consequence of the friction and deformation between the Nazca and South American Plates?

• Formation of new oceanic crust

• Frequent volcanic eruptions

• Frequent earthquakes

• Creation of new mountain ranges