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16 Cards in this Set
- Front
- Back
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basin
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low area on earth in which an ocean formed after the area filled with water from torrential rain
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salinity
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a measure of the amount of salt dissolved in sea water
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ion
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a charged atom or group of atoms
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dissolved salts in ocean
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chloride
sodium sulfate magnesium calcium potassium |
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what elements are removed from seawater to hep creatures from bones and shels
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calcium and silicon
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diatom
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type of algae that forms silica shells
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surface currents
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wind powered ocean currents that move water horizontallly, parallel to earth's surface, only the upper few hundred meters of seawater
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coriolis effect
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the shifting of winds and surface currents from their expected path, caused by earth's rotation; causes moving air and wind to turn left in southern hemisphere and right in northern hemisphere due to earth's rotation
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upwelling
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vertical circulation in ocean that brings deep cold water to the ocean surface
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density current
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circulation pattern in the ocean that forms when more dense seawater sinks beneath less dense seawater
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continental shelf
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gradually sloping end of a continent that extends under the ocean
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continental slope
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ocean basin feature that dips steeply down from continental shelf
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abyssal plain
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flat sea floor area from 4000 meters to 6000 meters below ocean surface, formed by the deposit of sediment
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mid ocean ridge
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area where new ocean floor is formed when lava erupts through cracks of earth's surface
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trench
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a long narrow steep sided depression in the sea floor where one crustal plate sinks beneath another
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sea mount
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underwater inactive volcano peaks
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