| A | B |
|---|
| Phytoplankton | produces much Produces the Earth’s oxygen and serves as the base of the ocean ecosystem |
| Most algae is found here | above the continental shelf |
| Tides | the gravitational pull of the moon |
| Ocean currents | wind patterns and water density |
| The place where water meets the land | the shoreline |
| salinity | the amount of salt in water |
| seamount | underwater volcano, sometimes form an island |
| trench | deep, narrow valley |
| continental shelf | underwater extension of the coastal plain |
| Continental slope |  |
| sea level | the average height of the sea water |
| depth | how deep something is |
| wave | a distubance on the surface of the water |
| pressure | the force of water or air that pushes down |
| crest | highest point on a wave |
| trough | lowest point on a wave |
| wavelength | distance from one crest to the next |
| frequency | how many waves pass a point in a certain amount of time |
| marine habitat | any salt water area such as a sea or ocean where animals make their home |
| Gulf Stream | warm current that moces north along the East Coast of the USA |
