Salut à tous ! Vous cherchez à échapper à la chaleur estivale ? Découvrez notre vidéo, "Des faits sur la neige qui vont vous donner des frissons" ! Elle est remplie de petits faits frais et glacés sur la neige qui vous feront oublier complètement le soleil brûlant. Prenez une boisson fraîche, détendez-vous, et laissez-nous vous rafraîchir avec quelques faits glacés ! Animation créée par Sympa.
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Musique par Epidemic Sound https://www.epidemicsound.com
Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna
----------------------------------------------------------------------------------------
Nos réseaux sociaux :
Facebook: https://www.facebook.com/sympasympacom/
Instagram: https://www.instagram.com/sympa.officiel/
Stock de fichiers (photos, vidéos et autres):
https://www.depositphotos.com
https://www.shutterstock.com
https://www.eastnews.ru
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Si tu en veux encore plus, fais un tour ici:
http://sympa-sympa.com
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FunTranscript
00:00Throw a snowball at your friends, put a carrot on your snowman, skate, and many other things.
00:06Here is the spirit of winter.
00:08And some little information about snow.
00:10You will be surprised to learn that snow can be of different colors.
00:14Let's start with yellow snow.
00:15If it starts to snow while the flowers are already in full bloom, then there is pollen in the air.
00:21In addition to giving you allergies, it settles on snowy surfaces.
00:26In this case, the snow mixes with the pollen, which gives it this funny yellowish hue.
00:31Snow clouds can also carry particles of sand.
00:35Yellowish snow was observed in South Korea in March 2006.
00:39Snow transported from the sand coming from the deserts of northern China.
00:43Pollen is often harmless, but the yellowish snow caused by the sand is not so innocent.
00:49It is linked to atmospheric pollution.
00:51When the NASA's Aura satellite detected this phenomenon,
00:55meteorological authorities warned the public against the potential risks of this golden snow.
01:02Sometimes, the color of the snow is closer to brown than yellow.
01:05Some trees, such as oak trees, have a rich tannin bark.
01:09It is an organic compound that protects only the tree against bacteria and harmful fungi.
01:15These tannins can fall to the ground near the tree.
01:18To do this, it must first rain, then the rain turns into snow.
01:22Humidity makes the tannins flow.
01:25Have you ever lied down in the snow and opened your mouth to let tiny flakes in?
01:31But to what extent can we eat these flakes safely?
01:35In most cases, you should not do it.
01:38But here is a tip for snow eaters.
01:40The safest way to consume snow is to choose a clean and white layer.
01:45Pick it up on the top, which is fresh and flaky.
01:48But it is better to avoid.
01:49We never know what the snow found in the street can contain.
01:54Then we have bluish snow.
01:56When there are clouds, the shadows are darker.
01:59The snow absorbs all the spectrum of colors.
02:02Finally, almost all the spectrum.
02:04It cannot absorb completely blue.
02:06Bluish snow is formed due to weather conditions.
02:09Snow flakes are translucent because they are made up of ice crystals.
02:14These crystals reflect light.
02:17This is why, in most cases, the snow seems white to you.
02:23Gray snow and black snow also exist.
02:26And I am not talking about the melted snow mixed with dirt near roads.
02:30I am talking about the one created with volcanic dust.
02:33Or with ash, ashes or exhaust gases.
02:37This type of snow is dirty.
02:38It can have a dusty or oily smell.
02:41If its color comes from petrochemical products, it is probably toxic.
02:48There is also watermelon snow.
02:50Its name comes from its red and green color.
02:53Unlike other colored versions, it has a sweet and fruity scent.
02:58Different types of algae and bacteria are at the origin of watermelon snow.
03:02But you have to be lucky to see it.
03:04Because it appears only in the alpine regions and on the polar coasts in summer.
03:09Green is due to chlorophyll.
03:12And red to astaxanthin.
03:14It is a kind of pigment.
03:16Fun fact, some animals, like pink flamingos, crabs and salmon,
03:21also draw their color from this pigment.
03:24This phenomenon is very important from an ecological point of view.
03:27When snow melts, it mixes with water and becomes a source of food for living beings.
03:34Snow can come in different colors, but also in different shapes.
03:40Snowballs are an example.
03:42For me, it's like someone dragging an ice cube on the ground.
03:47It's a rare phenomenon.
03:49It takes certain conditions for it to appear.
03:51There must be wind, but not too much.
03:54In general, 50 km per hour is enough.
03:57But it also depends on the snow.
03:59It must snow, and the power of snowfalls is another question.
04:05Snowballs appear in the meadows or on the slopes of the hills,
04:09where there are no rocks or trees.
04:11They are made up of two distinct layers of snow.
04:14The first is the pre-existing layer that has settled on the ground.
04:18The second is a fresh layer.
04:21Imagine the snow that would drizzle from a roller coaster without being able to cling to its surface.
04:27The wind then carries enough sticky snow to adhere to what is on its way.
04:32As the roller progresses, it thickens.
04:35Of course, there must be wind, and the ground must be in slopes.
04:40I would now like to address other interesting facts about snow.
04:43For example, its silence.
04:46Have you noticed that freshly fallen snow absorbs noises?
04:50Especially if you live in an animated city, you will realize that the atmosphere is calmer.
04:56It absorbs sound waves.
04:58It is like a sound absorption technology.
05:01But everything changes when it melts and then freezes.
05:04Ice reverberates sound waves.
05:07The sound then spreads further, and it is clearer.
05:14We are not the only ones who appreciate snow.
05:17Apparently, some species of monkeys also love it.
05:22Japanese macaques, or snow monkeys, also make snowballs to have fun.
05:27Young macaques are particularly attracted to snow.
05:31They mutually steal their snowballs, then fight to get them back.
05:38Snow, Blizzard, what else?
05:40I can count a few words related to snow, but the Inuit, for example, have dozens.
05:45And the Scottish have 421 terms associated with snow.
05:49For example, Skelf is a big snowflake, and Unbrack means the beginning of thawing.
05:56On one side, there is the cold and the risk of hypothermia.
06:00On the other, there are terriers and human igloos.
06:03We associate snow with cold, but it can warm us up.
06:07As snow is composed of more than 90% trapped air, it is an excellent insulator.
06:14We have talked about snow itself, but what about snowflakes?
06:19The shape of a snowflake is related to the temperature of the air.
06:23Researchers have examined snowflakes and discovered that long and thin ice crystals,
06:27like needles, are formed at about 2 ° C.
06:31They examined other samples of crystals taken at different temperatures.
06:36Snowflakes are flat like plates at low temperatures, about minus 5 ° C.
06:42Snowflakes can also have 6 branches or a dendritic structure.
06:48It also depends on the changes in the temperature of the surrounding air.
06:52You may have heard that there are no two identical snowflakes.
06:56A catalog of snowflakes confirms this theory.
07:00A chemistry professor has detected more than 30 different types of snowflakes.
07:04They are classified as follows, in columns, flat, ringed, irregular, etc.
07:09The reason for this great variety is the path that each snowflake takes to land.
07:15They are all faced with slightly different atmospheric conditions.
07:19They always have 6 sides, that's for sure.
07:23In 1988, a scientist found two identical snowflakes.
07:27Marvelous!
07:29Snow is also present in the deserts.
07:32I know it seems very contradictory.
07:35We are used to thinking of hot sand, cacti and nothingness when we talk about deserts.
07:41In the Valley of Death or the Sahara, we sometimes see snow.
07:45In fact, in January 2022, some parts of the Sahara Desert were covered with a white cover.
07:51It is unlikely that this happens often, but it is not impossible at all.
07:56Indeed, some nights, the temperatures in the desert are very low.
08:00Snow needs two things to form, cold temperatures and humid air.
08:05The phenomenon is therefore rather rare.
08:10A bonus, what is the record of the tallest snowman?
08:13In 2008, the inhabitants of the city of Bethal, in the United States,
08:17joined forces with those of the inhabitants of the neighboring cities to beat the world record.
08:22Their snowman measured 37 meters high.
08:25It took them more than a month to achieve it.
08:28The Statue of Liberty only measures a few centimeters more.
08:35When we see a strong snowstorm, we talk about Blizzard.
08:40But this is not always accurate.
08:42Indeed, a snowstorm must meet certain conditions to be qualified as Blizzard.
08:46For example, the wind must blow at least 55 km per hour.
08:51In addition, the snow must reduce visibility for at least 3 hours.
08:56Without this, we will rather talk about stormy storms or snowstorms.