Why is there salt in the sea? – Magian Mirror


Facebook Twitter Messenger WhatsApp LinkedIn Ah, the sun and the sea… perfect before thinking back to school. But sometimes, when we simply want to enjoy the present moment, the questions overwhelm us (especially when we’ve just had a drink): why is the sea salty? Come on, a little science can’t hurt. Salt in the sea and oceans: how is it made? The soil contains mineral salts. We are talking about rocks that were present 4 billion years ago, when the Earth had many volcanoes. There was no rain then, as we know it now, but condensation. It took 100 million years for the water vapor to turn into acid rain that began to drip rocks rich in mineral salts and, we’ll give you a thousand: mostly sodium. Over millions of years, rain eroded the soil and thereby washed away the mineral salts (sodium plus chlorine that was found in large amounts in the soil). The latter ended up in sea or ocean water. But here’s where your analytical mind gets carried away (we know Mirror Mag readers): since it’s the rivers and streams that carry this salty water to the sea, they should be salty too, no, they’re not they are not very small. The water, in fact, is continuously renewed by the rains; which is not the case of the seas or oceans which must be considered as the final point of this long journey and receptacle of all mineral salts. Analyzing the water of rivers and streams, we could find infinitesimal traces of salt, but not enough to feel it when drinking it (by the way, don’t have fun drinking this water, because you will be sick). It is even common to realize that while the water level may have dropped (water evaporates to form clouds), salt does not have this ability simply because it is too heavy to evaporate. Therefore, it increases in quantity, unlike water. Salt, so I float! Eureka, after explaining the presence of salt in the oceans and seas of the planet, we move on to the next mystery: unlike the water in a pool, we float better in the sea. It’s thanks to the salt. Salt water becomes very dense and is able to float more or less heavy bodies. Small scientific experiment: we take a liter of sea water in a bucket and extract the salt. Normally we would find 35 grams. There is a known sea, the Dead Sea, which contains 275 g per liter of water. Due to the great heat and evaporation, there are; as stated in the previous paragraph; more and more salt, and less and less water, especially because the rains are not frequent in this region of the world. A person cannot drown in it – it floats effortlessly. It’s normal to wonder about the effect global warming can have on our seas and oceans. If the periods of heat wave and drought increase, the water level will drop (without being renewed by the rains) and therefore the salt will be more and more present. It is possible that even the North Sea will one day look like the Dead Sea. Although the phenomenon is fascinating, it is above all worrying and should raise awareness about the climate emergency! Writing is second nature to Caroline: children’s stories, short story collections, she writes both for pleasure and for her professional life. “Helping Internet users find answers through my writing is a huge reward.” Contact=”https:>=”https:>Caroline Tellier’s latest articles (see all) Facebook Twitter Messenger WhatsApp LinkedIn
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