| A | B |
|---|
| Total amount of dissolved material in sea water | salinity |
| Most common dissolved substance in sea water | sodium chloride |
| Sources of dissolved substances in the ocean | chemical weathering of rocks on land & volcanic eruptions |
| Processes that increase salinity of oceans | evaporation & sea ice formation |
| Processes that decrease salinity of oceans | precipitation, runoff, & sea ice melting |
| Most dense water | Cold & salty |
| Effects temperature of water | latitude & depth |
| zone of ocean at surface with warmest water | surface mixed zone |
| zone of ocean in middle that has drastic temperature drop and density increase | transition zone |
| zone of ocean at bottom that is cold and dense & has 80% of ocean water | deep zone |
| marine organisms can be classified according to | how they move and where they live |
| 3 main factors that are used to divide the ocean into separate marine life zones | availability of sunlight, distance from shore, & water depth |
| Type of marine life that drift or float | plankton |
| Type of marine life that swim actively | nekton |
| Type of marine life that crawl on the sea floor | benthos |
| Deepest marine life zone of the ocean where life is sparse and no light can reach | abyssal zone |
