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Inside Earth 1:4
Ch:1 Sec:4 Sea-Floor Spreading
Question | Answer |
---|---|
deep-ocean trench | A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle. |
mid-ocean ridge | Giant undersea mountain range extending around the world like the seams of a baseball. |
sonar | A system that uses reflection of underwater sound waves to detect object. |
Seafloor spreading | The idea that the middle of the ocean is spreading apart, Moving very slowly in opposite directions. |
subduction | Process in which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent boundary. |