Seawater 15.2
Consumption of sediments by bottom-feeding organisms
A process that REMOVES SALT from seawater
Flow of rivers into the oceans
A process which DOES NOT ADD salts to seawater
Sequence of Water Mass movement:
A): Sea Ice forms during the winter B): Salt Ions accumulate beneath the ice C): Cold, salty water sinks D): Salty water migrates along the ocean floor to equator
3.5 percent
About what percentage of seawater is DISSOLVED SALTS?
Estuaries
Areas where large rivers empty into oceans
High rates of EVAPORATION and Low rates of Precipitation
Causes surface ocean water to have a higher salt content
Bottom Layer
Deepest Layer of the Ocean; 3000 - 4000 meters deep; cold, dark, temperatures near freezing
Comparisons of modern seashells and fossil shells
Evidence which indicates that the salt content of ancient oceans was about the same as it is today
Surface layer
Highest layer of the ocean; Relatively warm; lit by the sun; 0 - 1000 meters deep
Nutrients
In addition to salt, which substance is dissolved in seawater?
Thermocline
Second deepest layer of the ocean; 1000 - 3000 meters deep; its temperature rapidly decreases with depth
Salinity
The amount of DISSOLVED SALTS in seawater
Parts per thousand (ppt)
What UNIT is commonly used to measure the SALT CONTENT of water?
Sodium Chloride
Which SALT is most abundant in seawater?