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22 terms

Oceanography

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deep ocean currents
convection currents that flow far beneath the surface of the ocean. they are caused by temperature differences in the water, and the earth's rotation
surface currents
ocean currents on the top of the water that are driven by wind
coriolis effect
the apparent curving of the path of a moving object from an otherwise straight path due to the earth's rotation.
deflect
turn from a straight course , fixed direction, or line of interest
density
the amount of matter in a given space
salinity
the relative proportion of salt in a solution
abyssal plain
broad, flat portion of the deep-ocean basin
continental shelf
a gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent
continental slope
the steeply inclined section of the continental margin located between the continental rise and the continental shelf
trench
any long ditch cut in the ground
mid ocean ridge
An underwater moutain chain where new ocean floor is formed
thermohaline circulation
water circulation produced by differences in temperature and/or salinity (and therefore density)
guyot
flat-topped underwater mountain
seamount
an underwater mountain rising above the ocean floor
continental rise
the gently sloping surface at the base of the continental slope
active margin
usually narrow and consisting of highly deformed sediments. they occur where oceanic lithosphere is being subducted beneath the margin of a continent
passive margin
margin that consists of continental shelf, continental slope, and continental rise. they are not associated with plate boundaries and therefore experence little volcansim and few earthquakes
shoreline
a boundary line between land and water
global ocean conveyor
movement of warm and cold water
low latitudes
the region between the Tropic of Cancer and the Tropic of Capricorn
high latitudes
are located between 60° and 90° latitude, in both the Northern and Southern Hemispheres
gyre
large whirls of water within an ocean basin