Plate Tectonics 1.9

What is A?

• ocean trench
• mid-ocean ridge
• volcano
• rift valley

What is B?

• ocean trench
• mid-ocean ridge
• rift valley
• volcano

What is D?

• magma
• upper mantle
• lava
• convection

What is this boundary?

• convergent
• divergent
• transform
• neutral

What is this boundary?

• convergent
• transform
• subduction
• divergent

What is not a characteristic of divergent boundaries?

• earthquakes
• only occurs on sea floor
• formation of new crust
• volcanism

When plates move toward each other at convergent boundaries, the process of ____ usually takes place.

• subduction
• transformation
• sliding
• diving

Subduction happens as one plate sinks under another plate, down into Earth's ____.

• crust
• mantle
• asthenosphere
• core

In subduction, a long, steep, narrow depression in the seafloor where one plate sinks under another plate may develop; this is called ____.

• subduction convergence
• subduction zone
• abnormality
• volcanic ridge

Ocean trenches are some of the ____ parts of the sea floor.

• awesomest
• deepest
• slowest
• oldest