Small crystals, or clusters of snow crystals, make up snowflakes. There are no two same snowflakes.
When the crystalline crystal begins to fall from the cloud. On its way through the atmosphere, it collides and adheres to other crystals. This is how snowflakes form. As they fall from the cloud to the ground, the crystals collide, merge, break, partially melt or merge with rain drops. This all affects the final shape of the snowflake. For this reason, it is snow that falls most often of irregular shape. There are gaps filled with air between the crystals and the flakes. When the snow falls to the ground, the air remains trapped between the crystals. This is why we hear the sound of stepping on pristine snow. The sound depends on the temperature and the structure of the snow. Then the ice crystals break through which the air then flows.
The crystals are very small. Their diameter is about 1 mm. Snowflakes can be as large as one in size (up to (according to the Guinness Book of Records)) 38 cm the size of one snowflake in the US state of Montana. Most snowflakes have a diameter of about 2cm. However, under some circumstances, snowflakes larger than 5cm may form. This requires air temperatures around zero, light winds and an unstable atmosphere with directional flow of liquids and gases. The hexagonal shape of the snow crystals is derived from the shape of the crystal lattice of ice. When the water freezes, its molecules take such a position as to form a hexagonal prism. From this form the final appearance of a snow crystal is derived. This shape can rarely be halved or doubled. Sometimes we can find three or twelve-sided snow crystals in nature.
Research shows that it’s never too cold for snow to fall. It can snow at extremely low air temperatures if there is moisture and air lifting or cooling. It is true that snow usually falls at about 0 ° C because warmer air may contain more moisture. Fresh snow contains up to 95% of trapped air.
AMERICAN SCIENTIST Kenneth Libbrecht, after years of study, has proven that no single snowflake falling from the sky has the same shape.
Physicist Libbrecht of the Institute of Technology (California, The USA) has studied the shapes of flakes, crystal growth and their formation for years. He was making photos of snowflakes. U.S. Post officials were delighted with the snowflake photos of being posted on postage stamps.
Snowflakes have seven basic shapes. Cold conditions create crystals in flakes, which have more flat surfaces. The most symmetrical snowflakes are created during cold weather when there is no wind. If it is warmer, the crystals stick together. The flakes are not so symmetrical. At higher humidity levels, snowflakes branch out to a width. As they begin to fall from thousands of feet in height, snowflakes become dust that passes through clouds. By collecting water molecules, they flourish into crystal forms. They have a myriad of shapes due to the constantly changing conditions in the atmosphere.
– I’m trying to understand the dynamics of crystal growth down to the level of the molecule. It’s a very complicated problem, and ice is particularly interesting to study, ”Libbrecht said.
Snowflakes are no more than ice, but their shapes are stunning. An ice crystal is called a snow crystal, and several snow crystals held together form a snowflake. There are countless ways they stick.
If snow falls as temperatures get lower, fewer crystals bind to finer flakes. If the temperature is higher, the flakes contain a large number of crystals. Then it is said that the snow falls “in rags”.
Interesting facts about snowflakes:
* Snow is a mineral (like diamond or salt).
* Snowflakes fall at an average speed of 1.7 m / s. That means they take about five minutes from the cloud to the ground.
* Snowflake is a group of tiny ice crystals of different shapes.
* According to the Guinness Book of Records, the largest snowflake measured in 1887 fell in the United States. It had a diameter of 38 cm.
* About 12% of the Earth’s surface is covered by eternal snow and ice.
* Fresh snow contains up to 95% of trapped air.
* On average, one day a year it snows and shrubs.
* At the center of almost every snowflake is a grain of dust (aerosol, sublimation nucleus).
* There is never much snow on the Earth’s poles. Most of the blizzards we see on TV come from the old snow carried by the wind.
Winter activities empower and revitalize your body and mind. The benefits of natural light and fresh air will enhance people’s physical, spiritual and mental health.
Activities in the snow and cold, cold temperatures:
Get warmer, get out and walk. The most important thing is to have warm and waterproof boots. Walking in winter keeps your bones strong, which is great for people suffering from arthritis. Walking will also improve your mood and motivate you. It will stimulate faster calorie burning and speed up metabolism as the body consumes extra energy to heat up and maintain heat.
If you like to run, you can run regularly throughout the year, including the winter during low temperatures. There are many enthusiasts running in the winter, regardless of snow or rain. Protect your arms, legs and head. Wear warm clothes. It is important that you consult a doctor to ensure that cold air will not cause asthma attacks or chest pain.
Sledding is one of the most common activities during the winter. It is more common in children but equally fun for adults. All you need is a sleigh and warm clothes. You probably didn’t know that just an hour of sledding burns 468 calories. It is an activity that is entertaining. It is often accompanied by laughter. Laughing doubles your heart rate, which is great for overall health.
TYPES OF SNOWFLAKES
These frequent flakes are thin crystals that resemble six broad-shaped panels that form the star shape. Their surfaces are often decorated with incredibly rich and symmetrical markings. Flakes like this are created when the temperature is close to minus two degrees Celsius or close to -15.
Star plates often show characteristic peaks in arcs between adjacent aspects of the prism. When these arcs are particularly prominent, the crystals are called cut-off plates. The simplest sections are hexagonal crystals divided into six equal parts, like slices of cake.
Dendrite means “like a tree”, ie star dendrites are snow crystals that have branches and branches. These are fairly large crystals, usually two to four millimeters in diameter, easily visible to the naked eye. Star dendrites are the most popular form of snow crystals, which can be seen everywhere as decoration.
The word “snow”
The biggest words for snow are allegedly in the German language. Words are created (as with Eskimos) by descriptively merging multiple words. Scottish scientists (compiling the first Scottish glossary in history) discovered 421 words for snow. There are speculations that the Eskimos have as many as 50 words for snow. Scientists consider this claim a legend. Also the theory that word abundance is conditioned by the living environment is considered a myth.
Sources: http://www.gorila.jutarnji.hr http://www.nezavisne.com