| A | B |
|---|
| basin | A low area that contains an ocean |
| breaker | An ocean wave that tumbles forward and breaks up as it approaches the shore, because its top is moving faster than the bottom |
| crest | The highest point of a wave |
| density current | An ocean current that occurs when denser seawater moves under an area of less dense seawater |
| salinity | A measure of the amount of solids (mostly salts)dissolved in seawater |
| surface current | An ocean current found in the upper few hundred memters of seawater |
| tidal range | The vertical distance between high tide and low tide |
| wavelength | The distance between a point on one wave and the identical point on the next wave; for example, the distance between two crest |
| trough | The lowest part of a wave |
| turbine | A machine with fan blades that spin when water or air pushes on them; it turns a generator to produce electricity |
| upwelling | The rising of cold, nutrient-rich water from deep in the ocean to the surface |
| wave height | The vertical distance between the crest and trough of a wave |
| tide | The periodic change in the surface level of the oceans due to the gravitational force of the sun and the moon on Earth |
