ocean Flashcards

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1
Q

Pacific

A

The largest ocean- deepest and biggest in volume

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2
Q

Atlantic

A

2nd largest ocean in volume and depth

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3
Q

Indian

A

3rd largest ocean

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4
Q

Arctic

A

4th largest ocean

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5
Q

Southern

A

5th largest, found under the 60th line

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6
Q

Salinity

A

amount of salt in a mixture

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7
Q

Surface zone

A

the top layer of water, warmest

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8
Q

thermocline

A

the 32nd layer of water, temperature declines the fastest

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9
Q

Deep zone

A

3rd layer of water, very cold

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10
Q

water cycle

A

the continuous movement of water from the oceans to clouds to land to lakes back to oceans

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11
Q

evaporation

A

when water warms up into a gas

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12
Q

Condensation

A

when the gas water cools into clouds

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13
Q

precipitation

A

when the water cools further into rain or snow

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14
Q

continental shelf

A

the area of seabed around a large landmass where the sea is relatively shallow compared with the open ocean. The continental shelf is geologically part of the continental crust

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15
Q

Continental slope

A

the slope between the outer edge of the continental shelf and the deep ocean floor.

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16
Q

Continental divide

A

a drainage divide on a continent such that the drainage basin on one side of the divide feeds into one ocean or sea

17
Q

abyssal plain

A

An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 metres and 6,000 metres.

18
Q

mid-ocean ridge

A

A mid-ocean ridge is an underwater mountain system formed by plate tectonics. It consists of various mountains linked in chains, typically having a valley known as a rift running along its spine

19
Q

rift valley

A

a large elongated depression with steep walls formed by the downward displacement of a block of the earth’s surface between nearly parallel faults or fault systems.

20
Q

sea mount

A

A seamount is a mountain rising from the ocean seafloor that does not reach to the water’s surface, and thus is not an island, islet or cliff-rock

21
Q

Ocean trench

A

Oceanic trenches are topographic depressions of the sea floor, relatively narrow in width, but very long. These oceanographic features are the deepest parts of the ocean floor

22
Q

plankton

A

the small and microscopic organisms drifting or floating in the sea or fresh water, consisting chiefly of diatoms, protozoans, small crustaceans, and the eggs and larval stages of larger animals. Many animals are adapted to feed on plankton, especially by filtering the water.

23
Q

nekton

A

aquatic animals that are able to swim and move independently of water currents.

24
Q

benthos

A

the flora and fauna found on the bottom, or in the bottom sediments, of a sea, lake, or other body of water.

25
Q

desalination

A

a process that extracts mineral components from saline water