What makes ocean water salty?
Way back when, the earth had a fair amount of salt in its crust. As the earth aged, water carried this salt into the seas. A lot of time went by. The salt couldn’t go anywhere once it was stuck in the ocean. Water evaporates and the water cycle continues, but the salt remained – and remains today. The salinity of the ocean varies fairly widely by depth and by the area under inspection. Ocean currents, rivers dumping fresh water into the ocean.
