Earth Science Oceanography 9th Grade

question

Upwelling
answer

the motion of cold deep ocean water toward the surface.
question

Salinity
answer

the measure of the dissolved salts in water
question

Estuary
answer

the part of the mouth or lower course of a river in which the river’s currents meets with the sea tide
question

Mixed Layer
answer

the surface layer of ocean water
question

Thermocline
answer

the layer of ocean directly beneath the mixed layer, in which the temperature decreases rapidly
question

Echo Sounding
answer

a system which uses transmitted and reflected sound waves to measure distance to the ocean floor
question

Continental Shelf
answer

the flat or gently sloping submerged part of the continent. Extends from the shoreline out to the Continental Slope
question

Continental Slope
answer

the steep boundary between the Continental Shelf and the Continental Rise.
question

Continental Rise
answer

a gently undersea slope between the Continental Slope and the Abyssal Plain.
question

Active Margin
answer

a margin at which an oceanic plate is subducted under a continental plate, characterized by the presence of a continental shelf and a deep-sea trench
question

Passive Margin
answer

a margin which does not occur along a plate margin
question

Turbidity Current
answer

an undersea landslide of mud and sand, triggered by earthquakes or by gravity, that speeds down the continental slope carving out channels
question

Submarine Canyon
answer

an under sea gully that cuts through the continental shelf and continental slope
question

Abyssal Plain
answer

a large flat area on the ocean floor, composed of sediments that originated mostly on continents
question

Sea mount
answer

a cone-shaped undersea mountain of volcanic origin that rises above the ocean floor
question

Guyot
answer

a flat topped sea mount
question

Surface Current
answer

an ocean current which generally flows in the upper 1000 Meters of the ocean and is primarily driven by wind
question

Countercurrent
answer

a surface ocean current that flows in the opposite direction of the wind related current.
question

Density Current
answer

a subsurface current that is heavier or more dense than the surrounding water
question

Abyssal Hill
answer

one of a series of small rolling hills on the ocean floor that occur next to the continental margins and oceanic ridges.

Get instant access to
all materials

Become a Member