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Water in Earth's Processes
GPS S6E3 Unit III Lessons 10-12
28
Science
6th Grade
02/28/2007

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Term
Salinity
Definition
A measure of the amount of dissolved salts and other solids in a given amount of liquid.
Term
Glacier
Definition
A very slow moving river of ice.
Term
Ground water
Definition
Water that is located within rocks below the Earth's surface.
Term
Oceanographer
Definition
A scientist who studies the oceans.
Term
Sodium chloride
Definition
Ordinary table salt. A mix of the elements sodium and chlorine.
Term
Echo sounding/sonar
Definition
based on the echo ranging behavior of bats. used by sending high frenquency sound pulses from a ship to the ocean floor. the longer the pulse takes to get back to the ship, the deeper the water.
Term
Continental shelf
Definition
slopes gently down the edge of a continent; usually no deeper than 150 meters. it can extend from a few killometers to hundreds of killometers away from a shore.
Term
Contenental slope
Definition
slopes steeply from the continental shelf. it can drop off to a depth of about 2,000meters and it is usualy less than 150 kilometers wide.
Term
Submarine canyon
Definition
A steep V shaped canyon that cuts throught the continental shelf& slope. some are deeper than the grand canyon. they can be 1-15 killometers wide and can reach depths of about 2,000 meters
Term
Abysal plain
Definition
The flat ocean bottom. the flattest place on earth. Can be 1-1,000 killometers wide and 2-5 killometers deep.
Term
seamount
Definition
a steep walled, pointy, extinct volcano. it can rise more than 1,000 meters from the sea floor and can be 2-100 killometers wide
Term
Guyot
Definition
A flat topped seamount flattened by the action of waves.
Term
Midocean ridge
Definition
an Undersea mountin range; at more than 60,000 killometers long, this is the longest mountin range on Earth. It runs continuously through all of Earths oceans. it is 500-1,500 killometers wide and takes up about one third of the sea floor.
Term
Rift valley
Definition
A deep valley in the midocean ridge formed where the sea flooris pulled apart by forces acting below the floor. it can be 25-50 killometers wide and 1-2 killometersdeeper than the tops of the surrounding mountins.
Term
Deep sea trench
Definition
A very steep sided narrow cut in the ocean floor. (The deepest art of the ocean) they can be 30-100 killometerswide, can drop3-5 killometers bellow nearbyocean floors, and can reach a depth of more than 11,000 meters
Term
surface currant
Definition
An ocean currant that moves along the top part of the ocean
Term
Crest
Definition
The highest point of a wave
Term
trough
Definition
the lowest part of a wave.
Term
wave height
Definition
the vertical distance between the wave's crest and trough
Term
wave length
Definition
the distance from the crest of one wave to the crest of another
Term
Abyssal plain
Definition
Flat ocean bottom
Term
deep sea trench
Definition
very steep-sided narow cut in the ocean floor that contains odd animals with lights.
Term
mid ocean rige
Definition
undersea moutin ridge
Term
ocean current
Definition
a"river" of water that flows through the ocean. that carreis recorces
Term
tide
Definition
the rise and fall of the ocean's surface caused mostly by the gravitationl pull of the moon.
Term
wave
Definition
a desturbence that transfers energy throgh matter or space
Term
rift valley
Definition
deep valley in the mid ocean.
Term
oceanographer
Definition
a scientist who studies the oceans
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