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Anonymous users2024-02-12It is related to the speed of water vapor condensation and crystallization.
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Anonymous users2024-02-11There are 10 types of snowflakes, which are the most basic form of snow crystal, common prismatic snowflake, astrolabe-shaped snowflake, fan-shaped snowflake, star-shaped pine needle snowflake, star-shaped fern snowflake, hollow columnar snowflake, needle-shaped snowflake, crown columnar snowflake, and branch snowflake.
1. The most basic form of snow crystal
This is the most basic form of snow crystals. Snow crystals like these are usually small and difficult to see with the naked eye. Hexagonal prism snow crystals are what most snowflakes begin with, then grow "branches" and form more delicate structures.
2. Ordinary prismatic snowflakes
This shape of snowflake is similar to a hexagonal plank, except that its face is decorated with various dents and folds.
3. Astrolabe-shaped snowflakes
This thin, disc-shaped snow crystal has 6 broad "branches" that form a shape similar to that of a star. Its faces are often decorated with extremely fine symmetrical patterns. Astrolabe-shaped snowflakes form when the temperature is minus 2 degrees Celsius or minus 15 degrees Celsius, and it is a relatively common form of snowflakes.
4. Fan-shaped snowflakes
This is also a type of astrolabe-shaped snow crystal, except that it has a unique ridge between the prismatic faces, pointing to the corners.
5. Star-shaped pine needles and snowflakes
Snow crystals of this shape are large, typically 2 to 4 mm in diameter, and are easily visible to the naked eye. They are one of the most popular of all snow crystal types, and we can see them on a wide variety of holiday decorations.
6. Star-shaped fern-shaped snowflakes
The branches of the tree have a large number of side branches with stellate snow crystals, which look like ferns. They are the largest of all snow crystals, usually reaching 5 mm or more in diameter. Despite being "big", they are still single ice crystals, made up of water molecules connected end to end.
The powdery snow that flies to your knees when skiing is made of these snow crystals. They are usually thin and light, capable of forming a low-density snow field.
7. Hollow columnar snowflakes
This snowflake is a hexagonal cylinder with a tapered hollow structure at both ends. Hollow cylindrical snow crystals are small and require a magnifying glass to see the hollow area.
8. Needle-shaped snowflakes
Crystals are "slim" cylinders that form at about minus 5 degrees Celsius. If they fall down your sleeves, there's a good chance you'll mistake them for gray hair. When the temperature changes, the shape of snow crystals changes from a thin, flat disc to a slender needle, which is the most wonderful thing about them.
To date, scientists have not been able to explain why this change has occurred.
9. Crowned columnar snowflakes
The snow first grows into short, thick columns, and then is blown into an area of the clouds, where it becomes a disc. Finally, two thin disc-shaped crystals grow at both ends of an icicle, forming a crown-shaped column on display.
10. Snowflakes on branches
This snowflake is actually a combination of two snowflakes, one of which rotates 30 degrees relative to the other. Snowflakes like this are very rare.
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