6.10CD Tectonic Plates

What is Pangaea?

• the name of a German scientist
• the name of the super-continent that existed millions of years ago
• another name for continental drift
• the name of an ancient fossil

A place where two plates slide past each other, moving in opposite directions, is known as a

• transform boundary
• divergent boundary
• convergent boundary
• rift valley

A rift valley forms at a 

• convergent plate boundary
• divergent plate boundary
• transform boundary
• deep ocean trench

A collision between two pieces of continental crust at a converging boundary produces a 

• mid-ocean ridge
• deep ocean trench
• volcanic mountain range
• folded mountain range

At a convergent boundary, how can you determine which plate will be subducted under the other? 

• the denser plate is subducted under the less dense plate
• the younger plate is subducted under the older plate
• the plate nearest the poles is subducted under the plate nearer the equator 
• the plate with greater magnetic properties will be subducted under the less magnetic plate

What occurs when an oceanic plate is subducted under a continental plate?

• new oceanic plate is created
• continental crust is destroyed
• islands form
• oceanic crust is destroyed

What geologic process formed the Himalayas? 

• two continental plates converging
• an earthquake in a subduction zone
• a tectonic plate moving over a hot spot
• movement at a transform fault boundary

What do scientists believe is the force behind plate movement?

• gravity
• inertia
• convection currents
• magnetic pole reversals

Tectonic plate movements result in the formation of an oceanic ridge when____

• the ocean floor spreads
• there is heavy rainfall
• continental plates collide
• plates slide horizontally by each other

A divergent boundary is a boundary between two plates that ____

• move toward each other
• undergo subduction
• move away from each other
• slide along each other