Boundaries
A __________ boundary is where two tectonic plates move TOWARDS each other
Convergent
This is a really deep spot in the ocean where two tectonic plates meet, caused by the downward movement of subduction
Deep ocean trench
This is the point below the surface where rock breaks, causing an earthquake
The focus
When rock underground breaks, these happen
Earthquakes
This is the location that we studied where a divergent boundary and seafloor spreading is creating new crust
Iceland/Atlantic Ocean
A __________ boundary is where two tectonic plates move AWAY from each other
Divergent
This is a feature of Transform boundaries, a major crack in the earth where the plates scrape against each other and cause earthquakes
Fault
These volcanoes are generally associated with mid-ocean ridges
Shield Volcano
This is the process of one tectonic plate going under another, destroying crust
Subduction
This is the location that we studied where there's a Transform boundary where two tectonic plates are scraping past each other
California
A __________ boundary is where two tectonic plates scrape PAST each other in opposite directions
Transform
This is a long, volcanic mountain range - found underwater at divergent boundaries
Mid-Ocean Ridge
This is the type of volcano found at subduction zones (Japan, Ecuador)
Stratovolcano
This is the process that creates new crust, causing an ocean to widen
Seafloor Spreading
This is the location that we studied where a Convergent boundary causes subduction between oceanic and oceanic crust
Japan
A __________ boundary will cause subduction (if oceanic crust meets oceanic crust OR oceanic crust meets continental crust)
Convergent
This is a long, volcanic mountain range - created by the subduction of oceanic and oceanic crust
Volcanic Island Arc (the volcanoes create islands!)
This type of seismic wave moves as molecules bump into each other in a straight line
P-waves or Primary Waves
When oceanic crust collides with continental crust, subduction happens. WHICH crust goes under the other, and WHY?
Oceanic crust goes under the continental crust because it is more dense.
This is the location that we studied where a Divergent boundary is tearing a continent apart, similar to how Pangea broke apart
East African Rift Valley
A __________ boundary will eventually cause seafloor spreading
Divergent
This is a long, volcanic mountain range - created by the subduction of oceanic crust and continental crust
Continental Volcanic Arc (the volcanoes form on the edge of the continent!)
This feature is usually found in the same location as stratovolcanos
Deep ocean trench (because of subduction)
Briefly explain how magma for a stratovolcano is formed during subduction.
The plate that is going under, back into the Earth, heats up and melts. This magma makes its way back to the surface to form a volcano.
This is the location that we studied where a Convergent boundary causes subduction between oceanic and continental crust
Ecuador