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Subduction occurs where the oceanic crust bends down toward the mantle at a(n) ________.
sea-floor spreading
cool
subduction
found in all of Earth's oceans.
deep ocean trench
along mid-ocean ridges
sonar
subduction
In sea-floor spreading, molten material rises from the mantle and erupts
sea-floor spreading
cool
subduction
found in all of Earth's oceans.
deep ocean trench
along mid-ocean ridges
sonar
subduction
Old oceanic crust is more dense than new oceanic crust because it is
sea-floor spreading
cool
subduction
found in all of Earth's oceans.
deep ocean trench
along mid-ocean ridges
sonar
subduction
What technology did scientists use in the mid-1900s to map the mid-ocean ridge?
sea-floor spreading
cool
subduction
found in all of Earth's oceans.
deep ocean trench
along mid-ocean ridges
sonar
subduction
The ocean floor sinks beneath a deep-ocean trench and back into the mantle in a process known as ________.
sea-floor spreading
cool
subduction
found in all of Earth's oceans.
deep ocean trench
along mid-ocean ridges
sonar
subduction
Mid-ocean ridges are
sea-floor spreading
cool
subduction
found in all of Earth's oceans.
deep ocean trench
along mid-ocean ridges
sonar
subduction
The process by which the ocean floor sinks beneath an deep-ocean trench and back into the mantle is known as
sea-floor spreading
cool
subduction
found in all of Earth's oceans.
deep ocean trench
along mid-ocean ridges
sonar
subduction
The process of ___________ continually adds new crust to the ocean floor along both sides of the mid-ocean ridge.
sea-floor spreading
cool
subduction
found in all of Earth's oceans.
deep ocean trench
along mid-ocean ridges
sonar
subduction
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