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Science Ch.12 Vocab

Stack #209850

QuestionAnswer
atoll a ring-shaped island or chain of islands, usually made of corals, and which nearly encircle a lagoon.
backwash a gentle current of water that runs down a beach slope under an oncoming wave.
barrier island islands formed by waves and currents located parallel to a straight shoreline.
barrier reef a reef separated from the mainland by a wide lagoon.
beach the area of the shoreline located between the high tide and the low tide levels.
blowouts small, shallow depressions formed by deflation.
corals tiny, colonial sea animals that form a large part of Earth's reefs.
deflation removal of loose rock particles by the wind.
desert pavement pebbles and boulders left in a desert when the sand and silt are blown away.
dust storm a storm with strong, steady winds that lift great amounts of silt and clay from topsoil.
fetch the length of open water over which a wind blows steadily.
fiord lond, deep, steep-sided bay formed when the sea floods a glacial trough.
fringing reef a reef found close to the shore.
lagoon a shallow, protected area of water located landward from a sandbar.
loess fine sediment deposited by wind erosion.
longshore current a current that flows parallel to the shoreline.
period a subdivision of a geologic era; the time needed for one full wavelength to pass a given point.
refraction the bending of light waves as they pass from one kind of substance to another of different density, or when water waves reach shallow water.
rip current a srtong surface current that flows away from the beach.
sand bar a bar of sand formed by ocean currents depositing sand near the shore.
swash the motion of water pushed up by a beach by breaking waves.
tsunami a gigantic wave that results from an underwater earthquake, or a landslide, or volcanic eruption.
ventifact wedge-shaped rocks formed by wind erosion in deserts.
waveheight vertical distance between the bottom of a trough and the top of a crest.
wavelegnth the distance between two succesive wave crests.
Created by: christinad
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