Zones
Vocabulary
Vocabulary
Vocabulary
Questions
100
zone from 4,000 - 6,000 meters. no sunlight reaches this area.
What is abyssal zone
100
flat areas of ocean floor
What is abyssal plains
100
horizontal movements of water in a pattern
What is currents
100
unfrozen polar water has a high salt concentration so it sinks under less dense surface water.
What is salinity
100
Know how seamounts form
What is island erodes by waves making flat top plates carry islands away from ridge and sink below the ocean surface.
200
begins at continental slope to 4,000 meters (12,000 feet) depth
What is bathyal zone
200
organisms that live on ocean floor
What is benthos
200
flat topped submerged seamount
What is guyot
200
deep valleys in crust.
What is submarine canyon
200
Where are fracture zones located?
What is on the sides of moving tectonic plates.
300
faults (cracks) running perpendicular to the mid ocean ridge which form due to the sinking of tectonic plates
What is fracture zones
300
shallow portions of ocean floor made up of the continental crust and a thick layer of sediments
What is continental margin
300
huge circle of moving water above and below the equator
What is gyre
300
layer of water which dramatically decreases as the ocean depth increases
What is thermocline
300
Why do scientists analyze deep ocean core samples?
What is to find out about the history of the animals that used to live in the area.
400
only in ocean trenches
What is hadal zone
400
wedge of sediments at the base of the continental slope.
What is continental slope
400
continuous series of underwater mountain ranges that run along the floor of all oceans
What is mid-ocean ridges
400
deep valley in ocean floor made when one tectonic plate sub ducts under another tectonic plate
What is a trench
400
What causes deep ocean currents?
What is differences in water temperature and salinity
500
shallowest zone which lies between low and high tide lines.
What is intertidal zone
500
shallow layer of water where the ocean covers the edge of the continent
What is continental shelf
500
organisms that swim and eat plankton
What is nekton
500
dense currents which carry large amounts of sediments from the continental slope.
What is turbidity currents
500
What happens to deep ocean water as it becomes colder?
What is it becomes denser
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