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19 Cards in this Set
- Front
- Back
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sonar
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a device that determines the distance of an object underwater by recording echoes of sound waves
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continental shelf
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a gently sloping, shallow area of the ocean florr that extends outward from the edge of a continent
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continental slope
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a steep incline of the ocean floor leading down from the edge of the continental shelf
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abyssal plain
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a smooth, nearly flat region of the deep ocean floor
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mid-ocean ridge
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an undersea mountain chain where new ocean floor is produced
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trench
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a deep, steep-sided canyon in the ocean floor
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intertidal zone
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an area that stretches from the highest high-tide line on land out to the point on the continental shelf exposed by the lowest tide
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neritic zone
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the area of the ocean that extends from the low-tide line out to the edge of continental shelf
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open-ocean zone
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the deepest, darkest area of the ocean beyond the edge of the continental shelf
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plankton
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tiney algae and animals that float in water and are carried by waves and currents
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nekton
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free-swimming animals that can move throughout the water column
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benthos
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organism that live on the bottom of the ocean or other body of water
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food web
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the feeding relationships in a habitat
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estuary
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coastal inlet or bay where fresh water from rivers mixes with salty ocean water
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atoll
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a ring-shaped coral reef that surrounds a shallow lagoon
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bioluminescence
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the production of light by living things
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hydrothermal vent
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an area where ocean water sinks through cracks in the ocean floor, is heated by the underlying magma, and rises again through the cracks
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aquaculture
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the farming of salt water and fresh water organisms
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nodule
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a lump on the ocean floor that forms when metals such as manganese build up around pieces of shell
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