Volcanic island arc

Which type of plate boundaries can form volcanic island arcs?

• Divergent

• Convergent (destructive)

• Conservative

• Convergent (collisions)

Which type of plates are denser?

• Oceanic

• Continental

Which two boundaries form the Aleutian Islands?

• Pacific and North America

• India and Pacific

• Atlantic and South America

• North America and Atlantic

Which types of plates can form subduction zones?

• Two continental

• One continental and one oceanic

• Two oceanic

Which factors cause lava to form?

• Humidity

• Pressure

• Temperature

• Wind speed

What is the Benioff zone?

• The narrow zone of earthquakes dipping away from a deep-sea trench

• The narrow zone of volcanoes erupting from a deep-sea trench

Volcanic island arcs are due to continental plate folding.

• True

• False

Which diagram shows destructive plate boundaries

• 
• 

Which process does not occur in the formation of a volcanic island arc?

• Oceanic plate moves downward

• High pressure causes magma

• Magma cools then forms rocks

• Spreading of sea-floor

Which factor contributes to tectonic movement?

• Convection currents

• Ocean currents