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Ocean Systems Vocab
Term | Definition |
---|---|
sonar | a system that uses sound waves to measure distance and locate objects in the ocean |
downwelling | deep current that moves water from the surface to greater depths; brings down oxygen |
tidal range | the difference in height between a high tide and the next low tide |
continental shelf | the flat or gently sloping land that lies submerged around the edges of a continent and that extends from the shoreline out to a continental slope |
density | a measure of the amount of matter packed into a given volume |
neap tide | when the sun's gravity and the moon's gravity pull at earth from a different direction; smaller tidal bulge and tidal dip |
El Nino | global weather event caused by changes in wind and water movements |
ocean current | a mass of moving water |
spring tide | when the gravity of the sun and moon combine to pull Earth’s water in the same direction; extra-high tidal bulge and an extra-low tidal dip |
longshore current | mass of water moving parallel to the shore |
salinity | a measure of the amount of dissolved salt contained in water |
upwelling | deep current that moves water up to the surface; brings up nutrients |
rip current | narrow streams of water that break through sandbars and drain rapidly back to sea |
tide | the periodic rising and falling of the water level of the ocean |