The modern continent of North America was most recently part of the landmass called:
Gondwana
Antarctica
Pangaea
Laurasia
Gondwana and Laurasia formed when:
Antarctica broke away from Australia and Pangaea.
The ocean basin erupted in volcanic activity.
The supercontinent of Pangaea broke apart.
The North American continent separated from Australia.
In what way does the Pacific plate distinguish itself from the others?
It is the only transform plate.
It is the largest tectonic plate.
It is the least active.
It is the smallest yet the most active tectonic plate.
The outermost shell of the earth made up of the crust and upper part of the mantle is called the _____
lithosphere
asthenosphere
atmosphere
magnetosphere
Ocean trenches and volcanic mountains are two surface features commonly found at:
Divergent plate boundaries.
Transform plate boundaries.
All types of plate boundaries.
Convergent plate boundaries.
We would be likely to find a rift valley growing at:
A divergent boundary.
The deepest point of the ocean basin.
A continental shelf.
A zone of continental uplift.
What is the Cascade Range an example of?
A volcanic arc along an ocean-continent boundary.
Past Mid-Atlantic ridge transformation.
Catastrophic dynamism of the Earth's crust.
A subduction zone along a divergent boundary.
A good example of a transform boundary is:
The San Andreas Fault in California.
The Cascade Range in the Western U.S.
The Philippine Islands in the Pacific.
The Andes Mountains in South America.
Convergent and transform plate boundaries can both be responsible for:
The expansion of the ocean floor and a rich marine life.
The metamorphosis of fault lines between tectonic plates.
Continental drift and global warming.
Generating strong earthquakes.
Which of the following represents a divergent boundary?
The East African Rift Valley
The Andes Mountains
The San Andreas Fault
The Cascade Mountains
Wegener's name for the super-continent he thought existed before the continents broke apart was _____.
Panthallassa
Geotechnic
Lunagea
Pangea
Which of the following major plates is located farthest south?
The Arctic Plate
The African Plate
The South American Plate
The Antarctic Plate
Which of the following can be formed by a convergent boundary?
All of these
Volcanic islands
Volcanic mountains
Deep ocean trenches
As the leading edge of a tectonic plate moves back into the Earth, gravity can assist its movement downward. This is known as what?
Trench suction
Ridge push
Slab pull
Thermal convection
What do we know about the continents we have today?
They float on top of the ocean floor.
They have stopped moving due to plate tectonics.
They will never form another supercontinent.
They formed when Pangaea split apart.
When plates that are higher at the spreading center flow downhill and eventually flatten out to the ocean floor, we call that _____.
earthquakes
ridge push
slab pull
both ridge push and slab pull
