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| extremely level area of the deep ocean basin where depth is greater than 4 km |
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| benthic environment that begins at the end of the continental shelf and extends to 4,000 m |
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| organisms that live on the ocean floor |
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| benthic environment that lies between the low-tide and high-tide lines |
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| pelagic environment above the sublittoral zone filled with marine life |
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| pelagic environment that extends seaward beyond the continental shelf |
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| floating layer of sea ice that completely covers an area of the ocean surface |
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| number of grams of dissolved salt in 1kg of ocean water |
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| shallow benthic environment that is continuously submerged and that contains the largest number of benthos |
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| zone of rapid temperature change that begins just below the surface of the ocean |
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| process in which surface water moves farther out into the ocean and deep water moves upward to replace the surface water |
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| microscopic ocean animals |
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| foamy mass of water that washes onto the shore |
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| steady movement in one direction, such as that of water in the ocean |
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| weak, slow-moving, ocean current |
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| swift, warm atlantic current |
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| huge circle of moving ocean water formed as a result of the wind belts and the coriolis effect |
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| forms sand bars, formed as waves approach the beach at an angle |
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| tide with minimum daily tidal range that occurs during the first and third quarters of the moon |
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| swift movement of water caused by the return of water to the ocean through channels in underwater sand bars |
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| tide with maximum daily tidal range that occurs during the new and full moons |
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| one of a group of long, rolling waves that are all the same size |
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| surge of water that rushes upstream in a river as the tide rises |
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| difference between the levels of the high and low tides at a specific location |
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| lowest point between two wave crests |
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| irregular current that pulls water from a beach back to the ocean |
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| vertical distance between the crest and the trough of a wave |
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| time required for a complete wave length to pass a given point |
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