| A | B |
|---|
| salinity | the amount of salt in the ocean |
| sodium chloride | the most abundant salt in the oceans |
| surface zone | the uppermost and warmest zone of the oceans |
| thermocline | the middle zone of the oceans where temperature drops drastically as you go down |
| deep zone | the deepest and coldest zone of the oceans |
| surface currents | moving water at the surface of the oceans caused by wind |
| density | the mass per volume of a substance |
| deep current | moving water deep in the oceans caused by density differences in water |
| wave | a pulse of energy moving through the ocean |
| crest | the highest point of a wave |
| trough | the lowest point of a wave |
| wavelength | the distance between two crests of a wave |
| wave height | the distance between the crest and trough of a wave |
| tsunami | a huge wave caused by earthquakes |
| tides | a type of wave caused by the gravitational pull of the moon |
| guyot | a flat topped underwater mountain |
| seamount | a pointed top underwater mountain |
| midocean ridge | a huge underwater volcanic chain that is found in all oceans |
| continental shelf | gently sloping edge of the continent that is submerged underwater |
| continental rise | steeply sloping boundary between continental crust and ocean crust |
