| A | B |
|---|
| upwelling | rising of deep, cold currents to the ocean surface |
| deep current | caused by differences in density of water deep in ocean |
| surface current | ocean current caused by wind patterns |
| abyssal zone | begins at 2000m and extends to bottom of ocean |
| tsunami | giant sea wave produced by an earthquake |
| bathyal zone | begins at continental slope and extends to 2000 m |
| wavelength | distance between 2 consecutive crests or troughs |
| neritic zone | extends from low-tide line to edge of continental shelf |
| trough | lowest point of a wave |
| crest | highest point of a wave |
| plankton | animals and plants that float on surface of ocean |
| nekton | forms of ocean life that swim |
| intertidal zone | lies between the low-tide and high-tide areas |
| benthos | organisms that live on ocean floor |
