Divergent Boundaries
Convergent Boundaries
Transform Boundaries
Sea Floor Spreading
Potluck
100
The stress forces that acts on divergent boundaries
What is tension?
100
These are created when continental-continental crust collides
What are mountain ranges?
100
The stress force associated with transform boundaries
What is shearing?
100
The technology used to map the ocean floor
What is sonar?
100
A broad volcano usually found on the oceanic crust at plate boundaries.
What is a shield volcano?
200
When continental-continental crust diverges, these landforms are created.
What is rift vallies?
200
Valleys in the ocean floor created by the collision of oceanic-oceanic crust or oceanic-continental crust.
What are trenches?
200
The way the plates move in relation to one another at a transform boundary
What is slide past each other in two opposite directions?
200
This pattern in rocks on the ocean floor shows us the Earth's magnetic field has reversed several times
What is magnetic striping
200
A very explosive volcano with little to no magma.
What is a cinder cone?
300
An underwater chain of mountains created where oceanic-oceanic crust diverges
What is the mid-ocean ridge?
300
A chain of islands formed when oceanic-oceanic crust converges
What are volcanic island arcs?
300
The event that can take place when stress builds up and finally breaks at a transform boundary
What is an earthquake?
300
Geologist who mapped the ocean floor and discovered sea floor spreading
Who is Harry Hess
300
A volcano with lava rich in iron and magnesium
What is a shield volcano
400
This land form in Africa is created as the African Plate and the Somalia Plate diverge.
What is the Great Rift Valley?
400
The process where the denser crust is forced back into the mantle to be recycled
What is subduction?
400
This fault is near the place where the North American and Pacific Plate share a transform boundary
What is the San Andreas Fault
400
The search for U-boats during this war led to the discovery of sea floor spreading
What is World War II?
400
A very tall, steep volcano (like Mt. St. Helens) with lava rich in silica and usually found at oceanic-continental convergent zones.
What is a composite volcano?
500
The only place the mid-ocean ridge rises above the water
What is Iceland?
500
A rock created from the intense pressure of continental-continental convergence.
What is metamorphic rock?
500
Many transform faults are found along this long, underwater chain of mountains
What is the mid-ocean ridge?
500
Finally provided a mechanism for the movement of continents to support this theory
What is the theory of continental drift?
500
A rock formed from the cooling of magma.
What is an igneous rock?
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