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6 Cards in this Set
- Front
- Back
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mid-ocean ridge
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an undersea mountain chain where new ocean floor is produced at a divergent plate boundary
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sonar
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a device that determines the distance of an object under water by recording echoes of sound waves
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sea-floor spreading
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the process by which molten material adds new oceanic crust to the ocean floor
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Hess' evidence to support sea-floor spreading
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eruptions of molten material, magnetic stripes, ages of rocks
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deep ocean trenches
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a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle
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subduction
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the process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent plate boundary
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