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17 Cards in this Set
- Front
- Back
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salinity
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the total amount of dissolved salts in a sample of water.
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sonar
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a major advance in ocean-floor mapping
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seamount
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a volcanic mountain rising from the ocean floor that doesn't reach the surface
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trench
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a long, deep valley on the ocean floor through which old ocean floor sinks back toward the mantle
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continental slope
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the steep edge of the continental shelf
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continental shelf
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a gently sloping, shallow area that extends outward from the edge of each continent
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abyssal plain
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a broad area covered with thick layers of mud and silt
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mid-ocean ridges
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long chains of mountains on the ocean floors
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wave
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the movement of energy through a body of water
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wavelength
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the horizontal distance between crests
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frequency
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the number of waves that pass a point in a certain amount of time
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wave height
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the vertical distance from the crest to the trough
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tsunami
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usually caused by an earthquake beneath the ocean floor
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groin
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a wall of rocks or concrete
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rip current
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a rush of water that flows rapidly back to sea through a narrow opening
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longshore drift
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the movement of sand along the beach
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intertidal zone
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the highest high-tide line on land
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