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The oceans are salty because small amounts of salt from the land areas dissolve in the waters of streams and rivers, and are carried to the sea.
When water evaporates from the oceans into the atmosphere, the salt is left behind. The amount of salt dissolved in the oceans is, on average 3.5 % by weight.

Why is the ocean salty? - NOAA's National Ocean Service

oceanservice.noaa.gov/facts/whysalty.html

Ocean water is a complex solution of mineral salts and of decayed biologic matter ... The pool of brine in the foreground is nearly four times as salty as seawater ...

Why is the ocean salty, but rivers flowing into it are not?

oceanservice.noaa.gov/facts/riversnotsalty.html

The saltiness of the ocean is the result of several natural influences and processes; water from rivers entering the ocean is just one of these factors.

Why is the ocean salty? - USGS

water.usgs.gov/edu/whyoceansalty.html

Dec 2, 2016 ... One way minerals and salts are deposited into the oceans is from outflow ... which drain the landscape, thus causing the oceans to be salty.

Why is the Ocean Salty?

ponce.sdsu.edu/usgs_why_is_the_ocean_salty/usgs_why_is_the_ocean_salty.html

What arouses the scientist's curiosity is not so much why the ocean is salty, but why it isn't fresh like the rivers and streams that empty into it. Further, what is the ...

Why is the sea salty?

www.utdallas.edu/~pujana/oceans/why.html

Everyone also knows that fresh water in rain, rivers, and even ice is not salty. ... dissolved minerals or salts reaches a stream and flows into lakes and the ocean.

Why Is the Ocean Salty? Composition of Sea Water - Chemistry

chemistry.about.com/od/waterchemistry/f/why-is-the-ocean-salty.htm

Have you ever wondered why the ocean is salty and why most lakes are not? Here's a look at what makes the sea salty and its chemical composition.

www.ask.com/youtube?q=Why Is the Ocean Salty?&v=L9dpXa_Iemo
May 25, 2015 ... The ocean is salty, but most lakes and rivers are not. Why is this? Get 15% off http ://www.domain.com's s domain names and web hosting when ...

Why are Oceans Salty? - EnchantedLearning.com

www.enchantedlearning.com/subjects/ocean/Salty.shtml

Why are the Oceans Salty? Watercycle As water flows in rivers, it picks up small amounts of mineral salts from the rocks and soil of the river beds.

Why Is the Ocean Salty? | Salt in the Ocean - Live Science

www.livescience.com/32139-why-are-oceans-salty.html

Sep 17, 2012 ... Salts enter the ocean through rivers, which, before entering pass over rocks and soil, and pick up salt along the way.