Ocean Floor Geography
pH and Pressure
Light Zones
Habitat Zones
Misc.
100
An underwater mountain
What is a seamount?
100
The measure of how acidic or basic something is
What is pH?
100
The general name for the zone containing measurable light.
What is the photic zone?
100
The open ocean
What is the oceanic zone?
100
The area in the water column where temperature declines rapidly.
What is the thermocline?
200
A steep, deep cut in the ocean floor.
What is a submarine canyon?
200
The formation of carbonic acid due to an increasing amount of dissolved carbon in the ocean.
What is ocean acidification?
200
The zone that has no sunlight.
What is the aphotic zone?
200
In this ocean floor zone, life is very scarce.
What is the abyssal zone?
200
As you travel down from the surface, this ocean property INCREASES.
What is pressure?
300
The flat bottom of the ocean floor
What is the abyssal plain?
300
The amount of increase in atmospheric pressure (atm) for each 10m you travel in depth.
What is 1 atm?
300
Also called the twilight zone, this zone has SOME light, but not enough for photosynthesis.
What is the disphotic zone?
300
This area represents the floor of the ocean along the continental shelf.
What is the bathyal zone?
300
As you travel deeper from the surface, these two ocean properties DECREASE.
What are sunlight, temperature, and nutrient levels?
400
The portion of the ocean floor where there is a gradual change in depth of the sea floor.
What is the continental slope?
400
The physical consequences to a fish that is brought up from the deepest part of the ocean where the pressure is very high.
What are bulging eyes and the stomach exiting the mouth?
400
In this portion of the photic zone, sunlight is abundant and photosynthesis can occur.
What is the euphotic zone?
400
The hadal zone is cold and under extremely high pressure. This zone is located in these areas that go below the normal abyssal plain.
What are trenches?
400
When Cuvier's toothed whales descend to the deeper portions of the ocean, these organs collapse naturally, allowing the whales to adapt to the pressure.
What are their lungs?
500
The portion of the ocean floor represented by letter B.
What is the continental rise?
500
8.2
What is the current (or ideal) pH of most of the ocean?
500
This process cannot occur in the dark, and so nutrients must filter down from shallower zones.
What is photosynthesis?
500
This is a shallow zone along the continental shelf.
What is the neritic zone?
500
This feature of the ocean floor is caused by seismically active tectonic plates causing seafloor spreading.
What is the mid-ocean ridge?