Plate Boundaries
Continental Drift
Sea Floor Spreading
Volcanoes
Earthquakes
100
boundaries that rub together
What is transform boundaries?
100
the person who proposed the theory to continental drift
What is Alfred Wegner
100
this is the process that continuously adds new material to the ocean floor
What is sea floor spreading
100
most magma forms in
What is asthenosphere
100
A sudden movement of the earth's crust caused by the release of stress accumulated along geologic faults or by volcanic activity
What is an earthquake
200
new oceanic crust forms here
What is divergent plate boundaries
200
the name of the super-continent meaning "all land"
What is Pangaea
200
this is what erupts through the valley of the mid-ocean ridge
What is molten material
200
An opening in the earth's crust through which molten lava, ash, and gases are ejected.
What is a volcano
200
The point where movement occurred which triggered the earthquake is the
What is a focus
300
this type of plate boundary cannot ever have volcanoes
What is transform fault boundaries
300
the belief that continents have moved slowly apart to their current locations of earth
What is continental drift?
300
the crust and the upper mantle creates the __________
What is lithosphere
300
The broad volcanic feature formed by quiet eruptions on thin lava flows is called
What is a shield zone?
300
the point on the surface nearest the earthquake
What is an epicenter
400
Transform faults always form _________ to the spreading directions
What is parallel
400
the super-continent composed all the major continents joined together in the _______ era
What is Paleozoic
400
the entire cycle of heating occurring the mantle is called
What is convection currents
400
the name of magma that has escaped on earth's surface
What is lava
400
an instrument used to study earthquakes
What is an seismograph
500
the Himalayan Mountains were produced along
What is continental-continental convergent boundary
500
the breakup of the super-continent occurred in the ________ era.
What is Mesozoic
500
less dense than oceanic crust
What is continental crust
500
This is where the volanic materials that erupt are stored
What is magma chamber
500
the most earthquake prone state
What is California?
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