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22 Cards in this Set
- Front
- Back
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SONAR
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a system that determines the distance of an object under water by recording echos of sound waves.
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CONTINENTAL SHELF
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a gently sloping shallow area of the ocean floor that extends outward from the edge of the continent.
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CONTINENTAL SLOPE
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an incline leading down from the edge of the continental shelf.
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SEAMOUNT
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a mountain on the ocean floor that is completely underwater.
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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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the under sea mountain range where a new ocean floor is produced.
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TRENCH
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a deep canyon on the ocean floor.
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PLANKTON
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tiny algae and animals that float in water.
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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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organisms that live on the bottom of the ocean or another body of water.
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FOOD WEB
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the pattern of overlapping food chains in a habitat or ecosystem.
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INTERTIDAL ZONE
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the 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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ESTUARY
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a coastal inlet or bay where fresh water mixes with salty ocean water.
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BRACKISH
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water that is partly salty and partly fresh
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NERITIC ZONE
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the region of shallow water in the ocean that extends from the low tide line out to the edge of the continental shelf.
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OPEN-OCEAN ZONE
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the area of the ocean beyond the edge of the continental shelf.
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HOLDFAST
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a bundle of rootlike strands that attaches algae to rocks.
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ATOLL
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a ring shaped coral island that is found far from land.
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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, is heated by magma and rises up again through the cracks.
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AQUACULTURE
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the farming of freshwater and saltwater organisms.
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NODULES
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a black-potato shaped lump formed when metals build up around pieces of shell on the ocean floor.
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