Composition of Seawater
Diversity of Ocean Life
Oceanic Productivity
Miscellaneous
Miscellaneous
100
What is salinity?
Salinity is the total amount of solid material dissolved in water.
100
How are marine organisms classified?
According to where they live and how they move.
100
What is the use of light energy to convert water and carbon dioxide into energy-rich glucose molecules?
Photosynthesis
100
Areas that have so few organisms are considered ...
Biological deserts.
100
Define Density.
Density is defined as mass per unit volume.
200
What units are used to express the salinity of ocean water?
Oceanographers typically express salinity in parts per thousand (0/00), because the proportion of dissolved substances in seawater is such a small amount.
200
What are the three groups of marine organisms?
Plankton, Nekton and Benthos.
200
What are two factors that influence a region's photosynthetic productivity?
The availability of nutrients and the amount of solar radiation or sunlight.
200
What are hydrothermal vents otherwise known as?
Black smokers.
200
What is the upper part of the ocean into which sunlight penetrates called?
The photic zone.
300
What is pycnocline?
Pycnocline is the layer of ocean water between about 300 meters and 1000 meters where there is a rapid change of density with depth.
300
In which area can most benthos organisms be found?
Found mostly in shallow costal ocean floor since light can reach there for photosynthesis can occur
300
Which waters usually have high nutrient concentrations?
High latitude surface waters.
300
What factors affect the density of ocean water?
The density of ocean water is affected by two main factors: salinity and temperature.
300
What is thermocline?
Thermocline is the layer of ocean water between about 300 meters and 1000 meters, where there is a rapid change of temperature with depth.
400
What are the sources of salt in ocean water?
Most of the salt in seawater is sodium chloride, common table salt
400
What three factors are used to divide the ocean into distinct marine life zones?
The availability of sunlight, the distance from the shore & the water depth.
400
Where does abundant marine life exist?
Where there are ample nutrients and good sunlight.
400
What are the intertidal zone, neritic zone & oceanic zones?
Distances from the shore. Intertidal Zone = the area where land and sea meet and overlap; the zone between high and low tides; Neritic Zone = the marine-life zone that extends from the low-tide line out to the shelf break; Oceanic Zone = the marine-life zone beyond the continental shelf.
400
Name one organism found along hydrothermal vents.
Tube worms.
500
Explain what mixed zones are.
Mixed zones are the area of the surface created by the mixing of water by waves, currents, and tides.
500
What are the differences between nekton and plankton?
Plankton move with ocean currents and nekton move independently of ocean currents.
500
Which animals are most likely to survive, those who live through a food chain, or a food web?
A food web
500
How does the ocean’s surface water temperature vary?
The ocean’s surface water temperature varies with the amount of solar radiation received, which is primarily a function of latitude.
500
What are the three main zones of the open ocean?
Oceanographers generally recognize a three-layered structure in most parts of the open ocean: a shallow surface mixed zone, a transition zone, and a deep zone.
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