Plate Tectonics Review

Which process adds more crust to the ocean floor?

• suction

• sea-floor spreading

• subduction

• magnetic strip

Where does subduction occur?

• along the middle of the ocean floors

• down the middle of the mountain ranges

• on continents

• at deep-ocean trenches

Which theory describes the motion of and force driving Earth's plates?

• first law of motion

• third law of motion

• continental drift

• plate tectonics

The San Andreas fault is an example of which kind of boundary?

• transform

• divergent

• oceanic

• convergent

A valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle is?

• deep-ocean trenches

• mid-ocean ridges

• sea-floor spreading

• subduction

Process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary is?

• mid-ocean ridge

• sea-floor spreading

• deep-ocean trenches

• subduction

Boundary where two plates slip past each other, moving in opposite directions are?

• divergent

• transform

• convergent

Boundary where two plates collide?

• convergent

• divergent

• transform

Boundary where plates move away from each other are?

• convergent

• Divergent

• transform

What causes tectonic plates to move along the Earth's surface?

• wind
• ocean currents
• convection in the mantle
• expansion of the Earth