| A | B |
|---|
| Salinity | Number of grams of salts in 1 kg of water |
| Estuary | area where large river flows into the ocean |
| Thermocline | a zone of rapid temperature change in the ocean |
| 1 g/cm3 | the density of pure water |
| 1.027 g/cm3 | the density of ocean water |
| Sodium chloride | the main type of salt in ocean water |
| Coriolis effect | caused by the earth's rotation, it bends the earth's winds and ocean currents |
| Gyre | circular pattern in which ocean currents flow |
| Upwelling | when wind pushes warm surface waters away from the coast and cold, deep waters moves upward to take its place |
| Longshore current | a shoreline current forming a zig-zag current parallel to the shore |
| Rip current | a narrow powerful stream of water that flows at a right angle to the shore |
| undertow | forms when water carried to the shore in waves pulls back toward the ocean |
| El Nino | a disturbance of ocean currents that occurs every 3 to 5 years |
| Tides | daily changes in ocean water levels |
| Semidiurnal tides | areas that experience two high tides and two low tides each day |
| Diurnal tides | areas that experience one high tide and one low tide each day |
| Spring tides | daily tides with the greatest difference between high and low tides |
| Neap tides | daily tides with the least difference between high and low tides |
