The Oceans are saline or salty because of the several natural occurrences. One of the reason is the rivers because it brings water with minerals by crossing over soil and stones, moving salt along the way, which adds into the oceans, results in salinity by evaporating the water.
Ocean salinity levels can change from place to place. The Mediterranean Sea is saltier. The Atlantic Ocean has access to the freshwater rivers, such as the Amazon which provide less salinity in the ocean.
World War I and II. These wars caused lots of economic growth and development because there was a pressure to create better inventions. Having better technology could mean the win or lose of a war. :D
The pressure exerted by the air is said to be the atmospheric pressure and it acts as force over the surface of the earth. As pulls exerted by the gravity of the earth.
Commonly measured by the barometer, a device used to measure that atmosphere when values are measured or taken from the average mean sea levels.
Thus its defined be as force per unit area as air has weight. The development of high and low pressure is measured at the sea level which is 1013 pascal.
