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because the river flowing into it passes through salty rock, so it picks it up and deposits it in the dead sea

Not exactly. The Mediterranean Sea has dried out completely no less than four times. When that happens, it leaves a huge layer of evaporated salt behind. The land on the eastern side of the Mediterranean has also risen (because of geologic forces) and the result today is a lake sitting on the salt deposit. That salt deposit is in a physical depression and has no outlet. It is like a bowl made of salt holding water.

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Why is sea and ocean water is salty?

because of the minerals present on the sea bed


How can fish live in salty water when salty water hurts humans with a skin injury?

The ocean has always been salty and it is thought that life evolved in the oceans. This means that salt water fish have mechanisms for dealing with the salt in their environment. However, land animals have adapted to live away from the sea and have developed a waterproof covering (skin) to protect us from drying out. (They sort of carry a bit of the ocean with them). This means that if you were to dip your injury into SEA WATER (which is salty) you would NOT find this painful. The water must be made MORE SALTY than sea water before it would hurt. Water this salty would also hurt most fish.


What describes how salty sea water is?

Sea water is typically around 3.5% salt by weight, or 35 parts per thousand. This salinity can vary based on location and factors like evaporation and precipitation. It is this salt content that gives sea water its characteristic salty taste.


Why it is so easy to swim in sea water than swimming pool?

Sea water contains lots of dissolved salts. Thus the density of the salty sea water is more than that of water in swimming pools, and the salty water lifts you more than fresh water, which make swimming easier.


Why is the water in the sea salty?

The water in the sea is salty due to the presence of dissolved minerals and salts that come from the erosion of rocks on land. Rainfall carries these minerals into rivers, which eventually flow into the ocean, increasing its salt content over time. Additionally, underwater volcanic activity and hydrothermal vents also contribute to the salinity of seawater.