Plate Boundaries
...More Plate Boundaries
Sea Floor Spreading
The ocean floor
100
The type of boundary where two plates move away from each other.
What is a divergent boundary?
100
The type of boundary where two plates move towards each other.
What is a convergent boundary?
100
The ocean feature at which sea floor spreading occurs.
What is a mid-ocean ridge?
100
Long, thin mountain ranges running through the middle of the ocean are called this.
What is mid-ocean ridges?
200
The type of crust involved at a convergent boundary where volcanoes are not common.
What is a convergent boundary between two plates of continental crust?
200
These phenomenon are common at all types of convergent boundaries.
What are earthquakes?
200
As you move away from a mid-ocean ridge, crust tends to get ________(older/newer)
What is older?
200
This ocean feature occurs at the edges of continents in the ocean.
What is ocean trenches?
300
_____________ zone created when a denser ocean plate plunges underneath a continental plate
What is subduction?
300
A ________ valley forms at the very center of a divergent boundary.
What is a rift valley?
300
As you move away from a mid-ocean ridge, crust tends to get _________(thicker/thinner)
What is an increase in thickness?
300
These are vast, flat expanses at the bottom of the ocean, sometimes dotted with volcanoes.
What is abyssal plains?
400
The world's most well known transform boundary.
What is the San Andreas Fault?
400
The part of the earth that gets subducted in a convergent boundary.
What is the lithosphere?
400
We know the poles have switched because of this.
What is magnetic striping?
400
This occurs at mid-ocean ridges.
What is sea-floor spreading?
500
Northeastern Greenland, Eastern United States, and Western Europe share features which were formed at this type of plate boundary.
What is convergent?
500
Convergent boundaries create a volcanic ____ when they occur at the edge of a continent.
What is an arc?
500
The difference between continental drift and plate techtonics.
What is the lack of a mechanism for plate movement to occur?
500
The initial reason that maps of the ocean floor were created.
What is using sonar to find submarines in WWII?
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