Water Differences

Fresh, Salt, and Brackish

By: Caitlin Solosko

Fresh Water

  • water containing less then 1,000 milligrams per liter of disolved solids, mainly salt
  • 71% of Earths surface is covered in water; only 3% of that is freshwater
  • 68.7% of the 3% freshwater on earths surface is frozen in mountain glaciers and ice caps, 30.1% is ground water, and 0.9% is from other sources
  • there are 2 types of freshwater; static and flowing water
  • static water can be any size and is most commonly ponds, or puddles left from rain
  • flowing water can be any size as well, from a small stream to the long Mississippi River
  • freshwater is necessary for all living things
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Salt Water

  • otherwise known as saline water, salt water is water that contains a significant amount of dissolved salts
  • most often water from the oceans or seas
  • of the 71% of water on Earths surface, 97% of it is salt water
  • oceans average to have a saltinity of 3.5%, which means the sea water has around 35 grams of dissolved salts
  • salt water in denser than freshwater and has a density of 1.025g/ml
  • some sea life species must live in salt waters to survive
  • humans cannot consume large amounts of salt water

Brackish Water

  • brackish water is water that is more salty then fresh water, but not as salty as salt water
  • usually only contains .5% dissolves salts
  • mainly occurs when salt water and freshwater mix
  • the most extensive brackish water habitats occur when a river meets the sea
  • brackish water is the primary waste product salinity gradient power process(the energy available from the difference in salt concentration of seawater and salt water
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