| A | B |
|---|
| global ocean | all of the oceans on Earth |
| 71% | amount of Earth's surface that is covered by liquid water |
| Five main oceans | Atlantic, Pacific, Indian, Arctic and Southern |
| sodium chloride | the kind of salt that is found in the ocean...similar to table salt |
| where ocean salt comes from | dissolved minerals from rocks and soil that flow toward the ocean in rivers and streams |
| salinity | the amount of solid material that is dissolved in liquid like ocean water |
| slower moving water like in gulfs and bays | higher salinity |
| faster moving water | lower salinity |
| surface zone | the top layer of ocean water with the warmest temperatures |
| thermocline | the layer below the surface zone |
| deep zone | the layer below the thermocline where the coldest ocean water is |
| the density of ocean water | affected by temperature and salinity |
| why water moves in ocean currents | differences in density |
| convection currents | how differences in density cause water to move |
| sonar | sound navigation and ranging |
| ROVs | remotely operated vehicles |
| regions of the ocean floor | continental shelf, continental slope, continental rise, abyssal plain |
| mid-ocean ridge | what forms on the ocean floor where tectonic plates move apart |
| ocean trenches | what forms on the ocean floor where tectonic plates are moving toward each other in a process called subduction |
| seamounts | a volcanic mountain on the ocean floor |
| resources from the ocean | fish, plants, fresh water, tidal energy, oil, natural gas, minerals, |
| desalination | the process of removing salt from ocean water |
| renewable resources | resources that are capable of being replaced by natural ecological cycles or sound management practices |
| tidal energy | energy that is generated from the movement of tides |
| what many nodules found in the ocean contain | manganese, iron, copper, nickel or cobalt |
| EPA | The Environmental Protection Agency |
| causes of pollution in the ocean | trash dumping, sewage dumping, oil spills |
