| A | B |
|---|
| Salinity | The amount of dissolved salts in the ocean water |
| Surface Zone | Zone where ocean water is mixed by waves and currents |
| Thermocline | Zone in which temperature of the ocean water drops rapidly |
| Deep Zone | Area of extreme cold water below the thermocline |
| Shore Line | A boundary where the land and ocean meet |
| Continental Margin | The area where the underwater edge of a continent meets the ocean floor |
| Continental Shelf | The relativly flat parts of a continental margin that is covered by shallow ocean water |
| Continental Slope | The boundary between the crust of a continent and the crust of the ocean floor |
| Continental Rise | An area separating a continental slope from the ocean floor |
| Turbidity Currents | Flow of ocean water that carries large amounts of sediment |
| Currents | Streams or rivers that have motion on the surface and below the surface of the water |
| Submarine Canyon | Deep v- shaped vally cut in the rock through a continental shelf and slope |
| Abyssal Plain | Large flat area on the ocean floor |
| Seamount | Underwater volcanic mountain on the ocean floor |
| Goyot | Flat topped seamount |
| Trench | Long narrow crevice or crack along the edge of the ocean floor |
| Mid- ocean Ridge | Large mountain ranges found underwater |
| Coral Reef | Large mass of limestone rocks surrounding a volcanic mountain in tropical waters near a continental shelf |
| Fringing Reef | Coral reef that touches the shore line of a volcanic island |
| Barrier Reef | Coral reef seperated from the shore line of an island by an area of shallow water called a lagoon |
| Atoll | Ring of coral reefs surronding an island that has been warn away and has sunk beneath the surface of the ocean |
| Plankton | Animals or plants that float at or near the surface of the ocean |
| Nekton | Forms of ocean life that swim |
| Benthos | Organisms that live on the ocean floor |
| Intertidal Zone | Region that lies between the high and low tide lines |
| Neritic Zone | Area that extends from the low tide line to the edge of the continental shelf |
| Bathyal Zone | Open- ocean zone that begins at the continental shelf and extends about 2,000 meters |
| Abyssal Zone | Open ocean zone that extends to an average depth of 6,000 meters |
| Crest | High point of a wave |
| Trough | lowest point of a wave |
| Wave Length | Horazontal distance between two consecutive crests or two consecutive troughs |
| Tsunami | Ocean wave caused by an earthquake |
| Surface Currents | Ocean currents cuased mainly by wind patterns |
| Deep Currents | Ocean currents caused mainly by diffrences in the density of the water depth in the ocean |
| Upwelling | Rising of deep, cold currents to the ocean surface |
| Tides | The alternate rising and fallinmg of the surface of the ocean or other bodies of water |
