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Plate Boundaries
Vocabulary I
Volcanism
Earthquakes
Vocabulary II
100
At this boundary, old crust is recycled by subduction.
What is an oceanic-oceanic convergent boundary?
100
A narrow, elongated depression in the seafloor.
What is a deep-sea trench?
100
Convergent, Divergent and Hot Spot
What are the three zones of volcanism?
100
Crust, Mantle, Outer Core and Inner Core
What are the layers of Earth?
100
The transfer of thermal energy from warmer regions to cooler regions.
What is convection?
200
New ocean crust
What is created during each cycle of seafloor spreading?
200
A vast, underwater mountain chain.
What is an ocean ridge?
200
This zone of volcanism produces the most lava annually.
What is divergent?
200
These body waves are reflected and refracted by Earth's outer core.
What are secondary waves?
200
A place along an active fault that has not experienced an earthquake in a long time.
What is a seismic gap?
300
The driving forces of tectonic plates are related to convection currents in Earth's ________.
What is the mantle?
300
The point of failure/breaking of rock where earthquakes originate.
What is the focus?
300
Magma rises upward in a mantle plume due to __________.
What is low density?
300
Primary waves generate TWO shadow zones due to ____.
What is refraction in the inner core?
300
Unusually hot regions of Earth's mantle where high-temperature plumes of magma rise to the surface.
What is a hot spot?
400
The interaction between these two types of crust results in a chain of volcanoes along the edge of a continental plate.
What is oceanic-continental?
400
The resistance to flow.
What is viscosity?
400
Magmas with high viscosity also have high amounts of _______.
What is silica?
400
S waves do not travel through liquids or the outer core; therefore the outer core is ________.
What is a liquid?
400
The deformation of materials in response to stress.
What is strain?
500
Trench, Island Arc Volcanoes, Subduction Zone
What are features associated with an oceanic-oceanic convergent boundary?
500
A seismic wave that moves in right angles in relation to the direction of wave propagation.
What is a secondary or S wave?
500
Iceland is an example of this zone of volcanism.
What is divergent?
500
Primary and secondary waves change velocity due to changes in ______.
What is composition, temperature, density and pressure?
500
A fracture in crustal rock where movement occurs.
What is a fault?