Formation of continental and ocean floor features

What is subduction?

• one plate collides with another
• one plate destroys another
• one plate goes beneath another
• one plate divides another

The Earth's crust/lithosphere is broken up into pieces called _______.

• Tectonic Plates
• Tectonic Pieces
• Plate Boundaries
• Crust Plates

This picture shows which kind of Plate Boundary?

• Convergent Boundary
• Transform Boundary
• Divergent Boundary

What continental feature is forming in this picture?

• Sea-floor Spreading
• Volcano
• Earthquake
• Mountain 

The area around the Pacific Ocean where lots of earthquakes and volcanoes happen.

• Ring of Earth
• Ring of Fire

How do Volcanic mountains form?

• When rock combines with water to create a tight structure for a mountain. 
• When lava forms into an island. 
• When molten rock erupts on earth surface, and creates a mountain structure. 
• When rock and lava form a beach. 

Which of the following geographic features would not be produced by subduction?

• A volcanic rift valley.
• Volcanoes
• A deep, offshore trench
• A ridge of mountains close to the ocean.

What creates the magma that erupts from volcanoes in subduction zones?

• Tears in the crust allow magma to rise to the surface.
• Materials on the oceanic plate (such as plants+seawater) melt and evaporate and rise to the surface of the crust.
• The heat from friction between the two plates causes the continental plate to melt.
• None of the above.

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.

What type of boundary formed the East African Rift Valley?

• divergent
• convergent
• transfrom