| A | B |
|---|
| salinity | 35 parts per thousand |
| thermocline | zone of rapid temperature decrease |
| desalination | removing the salt from sea water |
| Coriolis force | the effect of the earth's rotation on wind and water |
| surface currents | horizontal currents caused by global winds |
| deep currents | vertical currents caused by density differences |
| upwelling | rising cold water brings nutrients to surface |
| crest | highest point of a wave |
| trough | lowest point of a wave |
| wavelength | distance between two crests |
| period | time for wave to pass a given point |
| tsunami | hugh wave formed by an underwater earthquake |
| tides | effect of moon's gravity on the ocean water |
| spring tides | occur during the new and full moons |
| neap tides | occur during the quarter moon phases |
| longshore current | current running parallel to the coastline |
| rip current | form at an opening in a sand bar |
| fetch | distance wind travels across the ocean |
| diatomaceous earth | made ofmicroscopic seashells |
| continental shelf | part of the continent extending into the ocean |
| continental slope | true end of the continent |
| submarine canyon | river valleys on the continental shelf |
| abyssal plain | true ocean basin |
| seamount | underwater volcano |
| guyot | flat-topped seamount |
| littoral zone | area between high and low tides |
| neritic zone | from low tide line to end of the continental shelf |
| bathyal zone | twilight zone |
| plankton | floaters |
| nekton | swimmers |
| benthos | bottom dwellers |
| producers | bottom of the food chain |
| atoll | coral ring surroung a lagoon |
| mid-ocean ridge | found at a diverging boundary |
| trench | found at a subduction zone |
