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The crust at the mid-ocean ridges is composed mainly of
frequent volcanic activity
mid-ocean ridges and rift valleys
convection currents in the asthenosphere
sections of the ocean floor that contain the youngest oceanic crust
basalt
A
A
continental margin
Mid-ocean ridges such as the East Pacific Rise and the Oceanic Ridge are best described as
frequent volcanic activity
mid-ocean ridges and rift valleys
convection currents in the asthenosphere
sections of the ocean floor that contain the youngest oceanic crust
basalt
A
A
continental margin
Which two features are commonly found at divergent plate boundaries?
frequent volcanic activity
mid-ocean ridges and rift valleys
convection currents in the asthenosphere
sections of the ocean floor that contain the youngest oceanic crust
basalt
A
A
continental margin
The edges of most lithospheric plates are characterized by
frequent volcanic activity
mid-ocean ridges and rift valleys
convection currents in the asthenosphere
sections of the ocean floor that contain the youngest oceanic crust
basalt
A
A
continental margin
Which location is closest to a major zone of frequent earthquakes and volcanic activities?
frequent volcanic activity
mid-ocean ridges and rift valleys
convection currents in the asthenosphere
sections of the ocean floor that contain the youngest oceanic crust
basalt
A
A
continental margin
The diagrams below show four major types of fault motion occurring in Earth’s crust. Which type of fault motion best matches the general pattern of crustal movement at California’s San Andreas fault?
frequent volcanic activity
mid-ocean ridges and rift valleys
convection currents in the asthenosphere
sections of the ocean floor that contain the youngest oceanic crust
basalt
A
A
continental margin
The movement of tectonic plates is inferred by many scientists to be driven by
frequent volcanic activity
mid-ocean ridges and rift valleys
convection currents in the asthenosphere
sections of the ocean floor that contain the youngest oceanic crust
basalt
A
A
continental margin
In which region of the ocean is the submarine canyon located?
frequent volcanic activity
mid-ocean ridges and rift valleys
convection currents in the asthenosphere
sections of the ocean floor that contain the youngest oceanic crust
basalt
A
A
continental margin
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