It's all in the name; salt water has salt and fresh water has no salt. The reason why some water is salty and some is not is not as simple. Usually, either there was salt in the floor of the ocean and it got mixed in or when rivers carry little particles of something in them, sometimes it's salt from the sides and bottom of the river. The water has the salt mixed in and eventually that water becomes part of the ocean.
You think probable to the movement of salt waters into fresh waters.
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The Chesapeake Bay is an estuary. It houses salt, fresh, and brackish (a mixture) of waters.
Fresh and salt water are very different for one key reason, fresh water doesn't contain salt and salt water obviously does. There are different flora and fauna in fresh and salt water for this reason.
Brackish water is a mixture of fresh and salt water. Rivers coming from inland headed to the ocean are fresh, then as they get closer to the salt water influences, the waters are brackish and then salt as you get closer to the ocean.
Manatees can live in both fresh and salt water, as well as brackish. If a manatee is in salt too long though, it must find other waters temporarily.
Salt water has salt water in it and is bad for you, fresh water has no salt water in it and is good for you.
Fresh water contains no sign of salt, while on the other hand salt water contains salt
Salt waters climate is the opposite of the fresh water's climate,so it's climate is salty.
Apsu was the god of fresh water, and Tiamat was the goddess of salt water.
Salt waters of the Atlantic
There are many different catfish species, salt water and fresh water.