Question

Ocean water is salty. Give reasons.

Answer 1

Hint: The total ocean water salt level is 35 parts per thousand, which averages out to 120 million tons of salt per cubic mile of seawater. Another factor of salty water is that the salt is supported by hydrothermal and volcanic activities underwater. Water is not saline throughout the world.

Complete Answer:
- Water of the ocean is made up of 70 percent of the Earth’s surface. Sodium, chloride, sulphate, magnesium, calcium, potassium, bicarbonate and bromide and several common mineral salts are present in ocean water through rivers which pass over rocks and soil, these salts reach the ocean, picking up salt along the way. This salt builds up in the ocean and evaporation is the only way that water can escape the ocean. And it doesn't take the salt with him as the water evaporates.
- So, you end up with less water and the same amount of salt, which makes the sea salty and beautiful. The levels of ocean salinity can differ drastically from place to place. For example, off the coast of continents that have large freshwater channels, such as the Amazon, the Mediterranean Sea is more saline than the oceans.
- Owing to the combination of fresh river water with saline ocean water, the Atlantic Ocean near the mouth of the Amazon River has comparatively low salinity. The Red Sea, where strong evaporation rates low precipitation and low river drainage and confined circulation result in unusually saline water, is the most salty open sea.

Note: In 1715, the British astronomer Edmond Halley first proposed the theory that salt was eventually deposited into the sea by rivers. To calculate its salinity "Practical Salinity Scale" was used where salinity was calculated in "practical salinity units (psu)". The "Reference Salinity" scale with the salinity represented in "g/kg" units is the current salinity norm.