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The salinity is basically how much salt is in the ocean. It increases in sub tropical places because there's not a lot of rain and more evaporation. The water evaporates and the salt stays behind thus making the water saltier. The salinity decreases in places more near the equator because it is always raining and that fresh rain dilutes the salt. It is also less salty near the coast because of the freshwater runoff "Seawater".
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What is one factor that decreases salinity in seawater?
Salinity in oceans decrease when near a river because the river adds fresh water, which lowers the percentage of salt in the water, causing the salinity to decrease.
How are density and salinity related?
Density and salinity are directly related in seawater - as salinity increases, the density of seawater also increases. This is because dissolved salts and other substances in seawater add mass without significantly changing the volume, thereby increasing the overall density. Conversely, a decrease in salinity will lead to a decrease in density.
What are the percentage of salt in seawater?
The average salinity of seawater is about 3.5%, which means that approximately 35 grams of salt are dissolved in 1,000 grams of seawater. This salinity can vary slightly depending on location and other factors.
If the average salinity of seawater is 29ppt how many grams of dissolved salts will 500g of seawater contain?
5 grams
What is the most negatively charged ion dissolved in seawater?
The most negatively charged ion dissolved in seawater is chloride. In fact, Cl- makes up 55 percent of the seawater's salinity.
What causes the density of seawater to increase?
The density of seawater increases due to an increase in salinity (amount of dissolved salts), decrease in temperature, and increase in pressure. These factors lead to a higher concentration of molecules in the water, making it denser.
What processes increase the salinity of seawater?
runoff from land
What is one factor that decreases salinity in seawater?
Salinity in oceans decrease when near a river because the river adds fresh water, which lowers the percentage of salt in the water, causing the salinity to decrease.
What factor affects the density of seawater in addition to salinity?
Temperature is another significant factor that affects the density of seawater. As temperature decreases, seawater becomes denser and sinks, while warmer seawater is less dense and rises. The interactions between salinity and temperature play a crucial role in driving ocean currents and circulation patterns.
How does the salinity of sea ice compare to the salinity of normal seawater?
Ice has zero salinity. When it is frozen, the salt is pushed out. Therefore, since the salinity of normal seawater is about 35 ppt, it has 35 ppt more salinity than seawater.
What are 2 main factors that influence density if seawater?
Temperature and salinity are the two main factors that influence the density of seawater. Colder seawater is denser than warmer seawater, while seawater with higher salinity is denser than seawater with lower salinity.
What is the most important factor affecting seawater density?
The most important factor affecting seawater density is its temperature. As temperature increases, seawater density decreases, causing it to expand and rise. Conversely, as temperature decreases, seawater density increases, causing it to contract and sink.
Which of the following causes the density of seawater to increase?
Seawater denssity will increase as salinity increases. A less significant increase can result from temperature variations (colder is denser until freezing starts). Even smaller changes would occur with depth as the seawater is slightly compressible. As density is measured as mass/unit volume local gravity does not enter into the process.
What is the average salinity of seawater by weight?
The average salinity of seawater is about 35 grams of dissolved salts per kilogram of seawater, or 3.5% by weight.
What is the best way to remember salinity?
One way to remember salinity is to think of "salt content in water." Salinity is a measure of the total amount of dissolved salts in seawater, typically expressed in parts per thousand (ppt). It is an important factor in oceanography and affects the density of water.
What is a factor which causes the salinity of the poles?
One factor that causes the high salinity of the polar regions is the freezing and subsequent rejection of salt from sea ice formation. When seawater freezes in these cold areas, salt is expelled from the ice, increasing the salinity of the surrounding water.
Which is not a process the decreases the salinity of seawater?
Evaporation is a process that increases the salinity of seawater, not decreases it. Other processes that decrease the salinity of seawater include precipitation, melting of icebergs, and the input of freshwater from rivers.
