| A | B |
|---|
| Waves | A rhythmic movement that carries energy through water or space |
| Crest | The highest point of a wave |
| Trough | The lowest point of a wave |
| Wave length | The distance between one wave to the crest of the next |
| Wave height | The distance from the crest to the trough |
| Current | Continuous, directed movement of ocean water. Like rivers of water that move through the ocean. |
| Surface current | The movement of the water at the surface. These occur in a set pattern |
| Deep water current | The movement of water in the deep ocean |
| Tide | The regular rise and fall of sea level |
| Tidal range | The difference between the height of sea level at high tide and low tide |
| High tide | When the sea level rises to the highest point |
| Low tide | When the sea level drops to the lowest point |
| Breaker | When the wave length decreases and the wave height increases, eventually the top of the wave curls over on itself |
| Trade winds... | Blow toward the equator |
| Westerlies.... | Blow away from the equator |
| Upwelling | The process when deep, cold currents rise to the surface along some western coastlines. |
