Plate Boundaries

These occur in the asthenosphere and are thought to cause the tectonic plates above to move.

• convection currents

• ocean currents

• spreading plate

• density currents

Name this plate boundary where two plates move away from each other in opposite directions. They divide!

• divergent

• convergent

• transform

• allegiant

Name this plate boundary. When two plates slide past one another with little up or down movement.

• divergent

• convergent

• transform

• transformers

Name this plate boundary, where two plates collide forming island arcs, subduction zones, volcanic mountains, and trenches.

• convergent

• divergent

• transform

• strike slip

The process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle is known as

• convection

• continental drift

• subduction

• conduction

The youngest rocks on the seafloor are most likely found...

• closest to a mid-ocean ridge

• farthest from a mid-ocean ridge

• near the coastlines

• closest to a deep sea trench

What happens when an oceanic plate collides with a continental plate?

• the denser oceanic plate  rides on top of the less dense continental plate
• the less dense oceanic plate slides under the denser continental plate
• the denser oceanic plate slides under the less dense continental plate
• the less dense oceanic plate slides past the denser continental plate

What type of land-form is created where two ocean plates move apart or separate?

• mid-ocean ridge
• divergent boundary
• transform boundary
• folded mountains

The feature labeled C represents some of the deepest spots on the ocean floor. These areas are called ___.

• mid-ocean ridge

• trenches

• deep-sea vent

• abyssal plain

In the image, which type of boundary is shown? Hint: its located in the state of California.

• divergent

• convergent

• transform fault