All Flashcards
What geological features are associated with oceanic-oceanic convergent boundaries?
Island arcs, oceanic trenches, and volcanoes.
What geological features are associated with oceanic-continental convergent boundaries?
Mountains and volcanoes.
What is the primary feature of a transform boundary?
Earthquakes.
How does plate tectonics contribute to the formation of volcanoes?
Subduction at convergent boundaries and magma rising at divergent boundaries.
How does plate tectonics contribute to the formation of earthquakes?
Friction and energy release at transform boundaries.
Why is the Ring of Fire significant?
It's a hotbed of volcanic and seismic activity due to the many plate boundaries.
What drives the movement of tectonic plates?
Convection currents in the Earth's mantle.
What is the role of density in subduction?
The denser plate subducts beneath the less dense plate.
How does seafloor spreading support the theory of plate tectonics?
It provides evidence of new crust formation at divergent boundaries, demonstrating plate movement.
What is the relationship between plate tectonics and mountain building?
Collision at convergent boundaries can cause folding and uplift, forming mountain ranges.
What are the steps of seafloor spreading?
Magma rises, cools, and forms new rock, pushing older crust away from the ridge.
What are the steps of subduction?
One plate slides beneath another, melts into magma, and can lead to volcanic activity.
Define convergent boundary.
A plate boundary where two plates collide.
Define subduction.
The process where a denser plate slides beneath a less dense plate at a convergent boundary.
Define divergent boundary.
A plate boundary where two plates move away from each other.
Define seafloor spreading.
The process where new oceanic crust is formed at divergent boundaries as magma rises and cools.
Define transform boundary.
A plate boundary where two plates slide past each other horizontally.
Define fault line.
A fracture in the Earth's crust where movement has occurred.
Define rift valley.
A valley formed by the separation of tectonic plates at a divergent boundary.
Define island arc.
A chain of volcanic islands formed at a convergent boundary where oceanic plates subduct.
Define oceanic trench.
A deep depression in the ocean floor caused by the subduction of one plate under another.
Define Ring of Fire.
A region around the Pacific Ocean characterized by high volcanic and seismic activity due to plate boundaries.