The difference between seas and oceans is the size of the area. The ocean is much larger than the sea and a sea is often surrounded on three sides by land.
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Ocean water has a higher salinity level due to the presence of dissolved salts, while fresh water has a lower salinity level. Ocean water is also denser and can support different types of marine life compared to fresh water ecosystems. Additionally, ocean water covers a much larger percentage of the Earth's surface compared to fresh water.
Ocean water has a higher salinity than fresh water.
Ocean water is more dense than regular fresh water because it contains higher concentrations of dissolved salts and minerals. These dissolved compounds make the water heavier, increasing its density. Additionally, temperature and pressure differences between ocean water and fresh water can also contribute to variations in density.
Fresh water that mixes with ocean water is called brackish water. Brackish water has a salinity level that falls between that of freshwater and seawater.
Salt waters of the Atlantic
the entrance to the ocean