Ocean Water and Life Quiz
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Created by:
Carrollton on March 15, 2011
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33 terms
Terms | Definitions |
|---|---|
 Which term describes organisms living on or in the ocean bottom? | benthos |
| The total amount of solid material dissolved in water, often expressed in part-per-thousand, is referred to as | salinity |
| the upper part of the ocean into which sunlight penetrates is called the | photic zone |
| The term that includes all organisms (algae, animals, and bacteria) that drift with the ocean currents is | plankton |
| The area where the land and ocean meet and overlap is called the | intertidal zone |
| The amount of carbon fixed by organisms through the synthesis of organic matter using energy from solar radiation or chemical reactions is | primary productivity |
| A linear arrangement of organisms through which energy is transferred, starting with a primary producer is | food chain |
| The ocean layer where there is a rapid change of density is the | pycnocline |
| All animals that are capable of moving independently of the ocean currents are called: | nekton |
| The area that is seaward from the low-tide line and covers the gently sloping continental shelf out to the shelf break is called the | neritic zone |
| Open ocean of any depth, where animals swim or float freely, is called: | pelagic zone |
| This means mass-per- unit volume | density |
| There is no light in the deep | aphotic zone |
| The marine life zone beyond the continental shelf is referred to as the | oceanic zone |
| Among plankton, algae are called | phytopnakton |
| The layer of the ocean where there is a rapid change in temperature with depth is known as the | thermocline |
| animals that deed through this are more likely to survive because they have alternate foods to eat. | primary productivity |
| In the surface waters of the ocean, strong sunlight supports what process by marine algae which directly or indirectly provide food for the vast majority of marine organisms | photosynthesis |
| The subdivision of the benthic zone that includes the deep ocean floor is the | abyssal zone |
| each feeding stage of a food chain is called a | trophic level |
| The mass of all living organisms, which consists mainly of plankton adrift in the ocean is the earth's | biomass |
| The portion of the photic zone near the surface where light is strong enough for photosynthesis to occur is the | euphotic zone |
| The principal source of water in the ocean is a process called: | outgassing |
| Which one of the following is NOT a process that decreases the salinity of seawater? | evaporation |
| Seawater consists of what % by weight of dissolved mineral substances? | 3.5% |
| Which of the following is NOT a zone in the three layered structure of the ocean according to density? | intertidal zone |
| The oceans surface water temperature varies with the amount of _____ received. | solar radiation |
| The highest overall oceanic productivity occurs in | temperate reagions |
| Which of the following is NOT a main oceanic producer? | sharks |
| The transfer of energy between trophic levels averages about | 2% |
| Salinity variations in the open ocean normally ranges from | 33-38% |
| The most abundant salt in the ocean is | sodium chloride |
| Which of the following properties most determines the water's vertical position in the ocean? | density |
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