| A | B |
|---|
| global ocean | saltwater covering 75% of Earth's surface |
| sonar | sound waves used to determine distance |
| trench | deepest v-shaped area on ocean floor |
| abyssal plain | flattest part of ocean floor |
| nodule | mineral lump on ocean floor |
| continental shelf | flat area next to all continents |
| continental slope | steep dropoff on ocean floor |
| guyot | flat topped mountain on ocean floor |
| seamount | mountain on ocean floor |
| mid ocean ridge | ridge formed on ocean floor where plates are spreading apart |
| salinity | measure of how much is dissolved in water |
| thermocline | separates warm surface water from cold deep water |
| upwelling | cold nutrient rich water from deep rises to surface |
| plankton | ocean life that floats on waves |
| nekton | ocean life that swims |
| benthos | ocean life that lives on the ocean floor |
| current | huge circle of moving water found above and below the equator |
| gulf stream | swift warm water current that flows up the east coast of the US |
| wave | disturbance in a solid, liquid, or gas |
| tide | periodic rise and fall of ocean level |
| crest | highest point on a wave |
| trough | lowest point on a wave |
| wavelength | distance from crest to crest |
| wave heigth | distance from trough to crest |
