The saltiness of the ocean, or its salinity, is fairly stable at about 35 parts per thousand. The lake is generally a temporary water stop before being taken out by another river. Thus, lakes are really only wide depressions in a river channel that have filled with water. To understand why the seas are so salty, look no further than the water cycle. After the Flood, some lakes became fresh and some salty. Rocks and soil erodes and turns into salt. Even though, that new salt do not increases the oceans' salinity, because the oceans are enormous. According to an article in Science Daily , a drop of water and its associated ions will remain in one of the Great Lakes for around 200 years. Another reason lakes tend not to be salty is because water often leaves lakes to continue its trip toward the sea. when the water evaporates the minerals stay behind. Such as salt. Why aren’t they salty? The water accumulatd into geological depressions which are now seas and oceans. Thus, lakes are really only wide depressions in a river channel that have filled with water. Lakes are temporary storage areas for water. c) As volcanoes erupted on the ocean floor, sea water mixed and dissolved with the molten rocks and thus injecting fresh new minerals into the water’s chemical composition. Favorite Answer. A. Water falls on land and often finds its way into either lakes or rivers. So, lakes get water from streams and rivers. They have no outlets to the ocean, and the minerals have built up over time. However, being far from the sun, the ocean surface is completely frozen. Gases from volcanoes dissolved in the water, making it acidic. Many people wonder why sea water is actually salty, while the water from streams, rivers and lakes usually doesn’t taste like salt. A few billion years ago, as the Earth was still undergoing complete formation a lot of outgassing occurred due to large volcanic activity, which resulted from geological instability. RIVERS, LAKES AND SOME SEAS HAVE A MUCH LOWER SALINITY THAN THE OCEANS. e) Salinity maintains a low concentration at the poles of the planet, because of large amounts of fresh water that constantly melts and dissolves the salts in the oceans. Others are more dilute simply because the water drains toward the sea and is replaced by fresh rainwater or other precipitation. Oceans are salty not because of what falls from the sky but from what's already on land. Why Is The Sea Salty, But Not Rivers And Lakes? Lakes are temporary storage areas for water. The Great Lakes are not salty because the water contained within them is on the move. Why is this? Well, some are! Part of the show Ghosts, Fast Food, and Vegetables. As explained above, the water that falls down as rain originate as vapor from the oceans, and these vapors do not contain dissolved salts. The earth around them has higher than normal levels of salt and minerals. It all comes down to a thing called the water- or hydrological cycle. Another reason why ocean water is salty is submarine volcanism or the eruption of volcanoes under the ocean. I understand that a person with a condition that would affect their immune system would have a harder time fighting the virus, but I don't see how a diabetic would struggle with it. What if change was not anthropogenic but a natural fluctuation leading us to a period of draughts where only repiles could survive ? Lakes are temporary storage areas for water. While water evaporates from the ocean, the salt gets left behind. But isolated bodies of water, however, can become extra salty. If the minerals associated with a lake don’t contain much sodium, the water won’t be very salty. 2 0. Why some lakes are freshwater, and some are *very* salty. However, the amount of salt in each watery body varies significantly from place to place. Sure, it might seem counterintuitive, but the ocean's saltiness is actually the result of a chain reaction that took place over hundreds of millions of years. If your lakes generally run into rivers, that enables them to shed excess mineral content. Why are these lakes salty while most of the world’s lakes are not? Here is the answer to this question: Rain refills the freshwater in to the rivers and streams. All the water that flows into these lakes escapes only by evaporation. It is thought that the salt in the oceans stems from erosion of bedrock on continents, where the minerals from these rocks are eventually carried out by rivers to the oceans. © 2017 Actforlibraries.org | All rights reserved Think of the Great Salt Lake and the Dead Sea.Other lakes, such as the Great Lakes, are filled with water that contains many minerals, yet doesn’t taste salty. Even though, that new salt do not increases the oceans' salinity, because the oceans are enormous. Lakes Albert, Victoria, and Edward are part of the Nile River basin. the oceans are saltier than lakes that have a much shorter residence time (time it takes for their water to be renewed). Lakes are temporary storage areas for water, and most lakes tend to be freshwater. Rivers and streams bring water to the lakes, and other rivers carry water out of lakes. Water falls on land and often finds its way into either lakes or rivers. The ocean is salty because dissolved minerals get dumped into the ocean. Both are saltwater lakes that are 10 times saltier than seawater. As it rained for many cventuries and even milleniums. In water, these are sodium, magnesium, and potassium. Water also travels under the ground. This means that the abundance of these substances will create specific tastes, such as saltiness. b) The water vapour condenses into clouds. 1 decade ago. The answer is quite simple. The Rift Valley lakes are a series of lakes in the East African Rift valley that runs through eastern Africa from Ethiopia in the north to Malawi in the south, and includes the African Great Lakes in the south. The reason why most lakes are not salty is because they have an outlet so the minerals do not accumulate. Lakes are temporary storage areas for water. Credit: CC0, via Pixabay. The acids dissolved minerals from lava, producing ions. The Dead Sea is not an actual sea, but an endorheic lake, which means that water flows into it but can not flow out. If the minerals associated with a lake don’t contain much sodium, the water won’t be very salty. 26 October 2003. What about lakes? On the other hand, a water droplet and its salts may remain in the ocean for 100-200 million years. Date: October 14, 2007 Source: University of Wisconsin-Madison Summary: The saltiness of the sea comes from dissolved … So why are governments, numerous organisations, individuals etc worrying about the phenomenon if it does not exist for shure ? Thus some lakes are salty but some not. The Nation’s Report Card: ​HOW DID U.S. STUDENTS PERFORM ON 2019 ASSESSMENTS? The main salts include dissolved sodium chloride, magnesium sulfate, potassium nitrate, and sodium bicarbonate. So, lake water comes into sea wit little salt concentration, evaporation occurs, removing some amount of water, and leaving salt amount unchanged, thereby increasing the concentration of salt in the ocean. This ensures that the concentration of chemicals in the water is fairly constant. But, most of Earth's water, and almost all of the water that people can access, is saline, or salty water. Salt lakes form when the water flowing into the lake, containing salt or minerals, cannot leave because the lake is endorheic or terminal. More recently, ions from eroded rocks entered the ocean as rivers drained into the sea. Salty Lakes. Why Is The Ocean Salty? Now, there are certain lakes too which are saline. So, the answer to why rivers and lakes are not as salty as the oceans is that salts and minerals that enter have an avenue for escape, which is a path to the oceans. This constant change of water means that, like with rivers and streams, there isn't any time for the concentrations of minerals to build up. Why is the ocean salty, but rivers flowing into it are not? Have you wondered why lakes might not be salty? The first guy to post was correct , water absorbs alot of things such as minerals. why is the ocean salty but lakes are not, One of the most significant discoveries was the inference of a global salt water ocean below the surface of Europa. Buy, Sell, and Trade your Firearms and Gear. But, Why is the river, that brings in all the salts (to the ocean), not salty? Because the water is so dilute, the lake is ideal for monitoring atmospheric contaminants. Opinion: From my view point, this article is very interesting because I've always wondered why an ocean has salty … So, lakes get water from streams and rivers. Another reason lakes tend not to be salty is because water often leaves lakes to continue its trip toward the sea. Why are these lakes salty while most of the world’s lakes are not? The water residency time in these is comparatively short, with rivers, fed by lakes, flowing out to the sea. why are lakes not salty You need to picture our oceans as giant sinks. Why are many lakes in the Eastern Mediterranean very salty and full of minerals? This process has been recurring for millions of years. Probably not, because if the level of salt rises any further the extra is removed by various processes, including chemical reactions, so the sea is now about as salty as it is going to get. Rivers and streams bring water to lakes just like they do to oceans, so then why don’t lakes get salty? Why is this? Partly it is because the water tastes salty if it contains sodium ions and chloride ions. Is the human causality the all decisive factor ? why are lakes not salty You need to picture our oceans as giant sinks. Another reason lakes tend not to be salty is because water often leaves lakes to continue its trip toward the sea. Answer Save. This theory was proposed by Sir Edmund Halley in 1715 A.D. To give you a sense of how much salt that is, it is estimated that if you took all the salt out of the ocean and spread it over the land, the salt would form a layer more than 500 feet (166 m) deep. Lakes only become salty when they are at the lowest point in a large watershed and where the primary "outlet" for accumulated water is evaporation. Anonymous. Some lakes have outlets to the ocean so they are less likely to be salty. This means rivers and lakes have tiny fragments of salt in them, which — little by little — are carried into the sea. It eventually ends up in rivers, lakes and oceans, where it soon evaporates to form clouds and repeat the cycle. Share. I think none of these answers are relevant. Larger Ocean vessels do not travel to the Great Lakes because of their additional beam, much like the larger Lakers do not travel to the Atlantic. But some lakes which don’t have outlets are trapped by rocks . Hence, why some lakes became fresh water lakes, such as the Great Lakes, Lake Titicaca, Lake Baikal and others, we do not know. Yes, the ocean didn't actually used to be so salty. river-1180135_1280.jpg. 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