06 Volcanoes & Plate Boundaries

New oceanic crust (sea floor) is created at this boundary.

• Divergent Oceanic

• Divergent Continental

• Convergent Oceanic

• Transform

Oceanic crust (sea floor) is destroyed at this boundary.

• Convergent Oceanic

• Divergent Oceanic

• Convergent Continental-Continental

• Divergent Continental

The process where oceanic crust slides under another plate and is melted is called ___________.

• seafloor spreading

• subduction

• continental drift

• recycling

What two crustal features occur near every subduction zone?

• Volcanoes and Trenches

• Rift Valleys and Mid Ocean Ridges

• Volcanoes and Rift Valleys

• Mid Ocean Ridges and Trenches

Where do volcanoes come from?

• Places where plates move apart
• Places where plates are moving together
• Hot Spots
• All of these options

This is the name for the chain of volcanos around the edge of the Pacific Plate.

• Circle of Fire

• Ring of Lava

• Ring of Fire

• One Hot Magma

What is the best explanation for why oceanic crust is subducted by continental crust?

• The oceanic crust is cooler than continental crust.
• Continental crust is denser than oceanic crust.
• Oceanic crust is denser than continental crust.
• The oceanic crust is hotter than continental crust.

Hotspots are found ___.

• at divergent boundaries
• at convergent boundaries
• at transform boundaries
• within a plate (intraplate)

Yellowstone National Park marks the location of a huge ___________

• Island Arc
• Divergent Boundary
• Convergent Boundary
• Hot Spot

Where do 75% of active volcanoes occur?

• Intraplate
• Divergent Boundaries
• Convergent Boundaries
• Transform Boundaries