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Chapter 4-Ocean Motion Study Guide Vocab
Sec. 1-3 & Chapter 5-First 2 pages
27
Science
6th Grade
05/23/2011

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Term
basin
Definition
low areas on Earth
Term
Coriolis Effect
Definition
the shifting of winds and surface currents from their expected paths that is caused by Earth's rotation
Term
continental margin
Definition
underwater end of continent which is close to shore
Term
continental slope
Definition
a continental margin that extends from the outer edge of the continental shelf down to the ocean floor
Term
mid ocean ridge
Definition
the area in an ocean basin where new ocean floor is formed
Term
salinity
Definition
a measure of the amount of salts dissolved in seawater
Term
sounding
Definition
term for measuring depth
Term
trench
Definition
a long, narrow, steep-sided depression where one crustal plate sinks beneath another
Term
crest
Definition
highest point of the wave
Term
wave
Definition
a rhythmic movement that carries energy through matter or space
Term
wave
Definition
a rhythmic movement that carries energy through matter or space
Term
nitrates
Definition
a combination of oxygen and nitrogen and are also important nutrients for plants
Term
halite
Definition
a salt and a combination of sodium and chloride that is formed when seawater evaporates
Term
guyot
Definition
flat-topped seamount found in the Pacific Ocean
Term
trough
Definition
lowest point of the wave
Term
tide
Definition
the rise and fall in sea level
Term
desalination
Definition
the process of removing salt from ocean water
Term
upwelling
Definition
a vertical circulation in the ocean that brings deep, cold water to the ocean surface
Term
seamount
Definition
under-water, inactive volcanic peaks
Term
abyssal plain
Definition
flat seafloor area
Term
amplitude
Definition
half the distance of the wave height
Term
surface current
Definition
a wind-powered ocean current that moves water horizontally and parallel to Earth's surface
Term
surface current
Definition
a wind-powered ocean current that moves water horizontally and parallel to Earth's surface
Term
density current
Definition
a current that forms when a mass of seawater becomes more dense than the surrounding water
Term
volcanic island arc
Definition
an archipelago of volcanic islands that is in an arc
Term
continental shelf
Definition
the gradually sloping end of a continent that extends under the ocean
Term
breaker
Definition
a collapsing wave
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