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BlakeNo, they havn't always been salty. The sea gets salty because when rain falls on the land it gets absorbed into the soil. It keeps going until it enters a stream or river. On its journey to the river or even in the river on the journey to the sea, it collects minerals, one of those is salt! So, before it had ever rained, you could actually drink the sea!
When the earth formed, those minerals from which it was made that are readily soluble (such as sodium chloride - salt, but also other minerals) in water dissolved into the water found on the planet. This water filled the lowest depressions to make the oceans and these oceans were and are salty.
All rivers, streams and such, lead to the ocean. As the streams flow, they simply pick up salt from rocks, and other such stuff that may have salt, and carry to the ocean. so graduelly the ocean gets saltier every year. Another answer: I heard or read somewhere, that as mankind harnesses the water from the major rivers, less fresh water reaches the oceans. This, in turn, makes the ocean salt levels higher, because there is less fresh water to dilute the salt content.
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Why is polar water saltier than other ocean water?
Polar water may appear saltier due to the formation of sea ice during the winter. When sea ice forms, the salt is pushed out, making the surrounding water saltier. Additionally, the decrease in temperature in polar regions can cause higher density seawater, which can result in saltier water.
What is saltier the sea or the ocean?
The terms "sea" and "ocean" are often used interchangeably, but the ocean is generally saltier overall due to its larger size and higher evaporation rates. However, there can be variation in salinity levels between different seas and oceans based on factors like climate and proximity to freshwater sources.
How do scientists explain the fact that some landforms that are far apart and separated by oceans appear to be related?
Erosion
Which water tend to be saltier?
Oceans tend to be saltier than freshwater bodies such as lakes and rivers. This is because oceans contain dissolved salts from minerals in the Earth's crust and are constantly receiving runoff from land that carries more salts into the ocean.
Why does evaporation makes the water saltier?
Evaporation makes water saltier because when water evaporates, only the pure water molecules escape, leaving the salt and other impurities behind. This concentrates the amount of salt in the remaining water, making it saltier.
