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18 Cards in this Set
- Front
- Back
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how long have people been studying the ocean floor?
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since ancient times because it provides trade and a route for travel.
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what is a sonar
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an object that uses sound waves to calculate the distance to an object
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if you could travel on the ocean floor what would you see?
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the continental shelf, continental slope, abyssal plain, and the mid-ocean ridge
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what is the continental shelf?
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a gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent
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what is the continental slope?
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an incline beyond the edge of the continental shelf
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what is the abyssal plain?
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smooth, nearly flat region of the ocean floor
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what is a mid-ocean ridge?
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an undersea mountain chain where new ocean floor is produced
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what is a trench?
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a deep, steep-sided canyon in the ocean floor
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what are the names of the 3 ocean zones?
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intertidal, neritic, and the open- ocean zone
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when does the intertidal zone begin and end?
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at the highest high-tide line it begins and ends at the point exposed by the lowest low tide
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when does the neritic zone begin and end?
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begins: low tide line
ends: the edge of the continental shelf |
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when does the open-ocean zone begin?
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Begins: beyond the edge of the continental shelf
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what are the 3 zones in the open-ocean zone?
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surface, transition, and deep zone
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how do scientists classify marine organisms?
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according to where they live and how they move
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what are plankton?
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tiny algae and animals that float in the water and are carried by currents and waves ( tiny young fish)
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what are nekton?
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free-swimming animals that can move throughout the water column (squid and most fishes)
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what are benthos?
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organisms that inhabit the ocean floor (crab, sea stars, octopus, and lobsters)
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what is a food web?
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feeding relationships in a habitat
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