The shape of a snowflake It s simpler, I m only in third grade

Hexagonal snow flakes and hexagonal prism snow crystals are the most basic forms of snowflakes.

The basic shape of a snowflake is hexagonal, but there are almost no two identical snowflakes in nature, just as no two identical people can be found on earth. Many scholars have observed thousands of snowflakes with microscopes, and these studies have shown that snowflakes that are exactly the same shape, size, and parts are perfectly symmetrical cannot be formed in nature.

The shape of the snowflake is hexagonal. Snowflakes are a beautiful crystal, also known as Weiyang flower and Liuchu. The basic shape of a snowflake is hexagonal, but it can take on a variety of shapes depending on the environment.

It's almost impossible to find two identical snowflakes in nature. This is mainly due to the fact that the temperature and humidity in the snowfall cloud change rapidly as the snowflakes grow, and the shape of the snowflakes will vary if there is a slight difference.

Causes of formationThe shape of a snowflake is involved in the crystallization process of water in the atmosphere. When the water molecules in the atmosphere cool below freezing, they begin to condense and form crystals of water, known as ice crystals. Ice crystals, like all other crystals, have their most basic property of having their own regular geometry.

Ice crystals belong to the hexagonal crystal system, which has four crystalline axes, of which three auxiliary axes are in a plane and intersect each other at an angle of 60 degrees. The other main axis is perpendicular to the plane formed by these three auxiliary axes. The most typical shape of the hexagonal crystal system is the hexagonal prism. However, when the crystallization process is slow in the main axis direction and fast in the auxiliary axis direction, the crystal will be hexagonal sheet.

Optimal: Hexagonal or hollow ice prism at most.

1. In the evening, large snowflakes fell from the dim sky. Suddenly, the mountains, rivers, fields, and villages were all shrouded in white snow.

2. Gentle little snowflakes fall slowly. Gradually, the little snowflakes became larger, thicker, and denser.

3. The cold wind roared "whirring", using its thick fingers to brutally scratch the hair of pedestrians, and pierce the skin of pedestrians like needles. Pedestrians had no choice but to button their winter coats tightly, put their hands in their pockets, shrink their necks, and walk forward quickly. The pines and cypresses on both sides of the road are standing in high spirits, proudly facing the wind, frost, rain and snow, inspiring people to move forward bravely.

4. When the snow is falling, it is a beautiful scenery that I have rarely seen in ten years, and those small snowflakes are so white and pure. The mountains, rivers, trees, and houses are all covered with a layer of snow, and thousands of miles of rivers and mountains have become a world of pink makeup and jade!

5. Snow, it is a gift from Grandpa Winter to people, it is as white and flawless as a white angel, it is the embodiment of beauty, falling from the sky one after another, and like a small butterfly flying in the air.

6. Falling to the ground, as if laying a thick blanket on the earth; Falling on a tree, as if dressed in silver; Landing on the car, like a freshly baked cream cake. This beautiful snowy scene immerses people in the fresh air. Everywhere is covered in silver, and it is beautiful.

Snowflakes are all made ofXiaoiceEach Xiaoice flower has six petals, some petals like mountain flowers emit beautiful small side tongues, some round, arrow-shaped, or zigzag-shaped, some are complete, some are lattice-shaped, but none of them exceed the range of the six-petal type, and the basic shape of the snowflake is hexagonal and hexagonal prismatic snow crystals.

Studies have shown that snowflakes that are exactly the same shape, size, and parts are perfectly symmetrical cannot be formed in nature. Because the water vapor content in the atmosphere around the snowflakes cannot be the same in all directions, as long as there is a slight difference, the side with more water vapor content will always grow faster, and it will naturally take on a variety of shapes and shapes of snowflakes.

The physical process of snowflake formation:

1. The composition of snowflakes is water, so the physical steps of the formation of snowflakes are: water vapor.

Water ice. 2. The clouds in the sky contain the physical changes of water. Clouds can be composed of small water droplets or Xiaoice crystals or a mixture, and raindrops and snowflakes are formed by the growth and growth of small water droplets and Xiaoice crystals.

3. In the snowy clouds, there are many Xiaoice crystals due to the temperature. When these Xiaoice crystals collide with each other, the surface of the ice crystals will heat up and melt somewhat, and they will stick to each other and freeze again. This is repeated many times, and the ice crystals increase.

In addition, there is also water vapor in the clouds, so the ice crystals can continue to grow by condensation.

4. The growth of ice crystals is completely controlled by perfect mechanics (covalent bonds.

As a result, ice crystals under the microscope will take on a wide variety of forms.

5. Hybrid cloud.

It is composed of Xiaoice crystals and supercooled water droplets. While a mass of air is said to be saturated with ice crystals, it is not yet saturated with water droplets.

At this time, the water vapor in the cloud condenses on the surface of the ice crystals, but the supercooled water droplets are evaporating, and the phenomenon of ice crystals adsorbing water vapor from the supercooled water droplets occurs. In this case, the ice crystals grow quickly.

6. When the supercooled water droplets collide with the ice crystals, they will freeze and stick to the surface of the ice crystals, making it increase rapidly. When the Xiaoice crystals grow large enough to overcome the resistance and buoyancy of the air, they fall to the ground, which is called snowflakes.

Snowflakes actually have only 35 normal shapes. These shapes, including columnar ice crystals, irregular snow particles, and flat crystals, make up the "traditional" hexagonal snowflakes.

This chart shows 39 types of "solid precipitation" or snow, including 35 types of snowflakes and their names. The 39 intermediate crystal families were further divided into 8 groups, namely columnar ice crystals, flat crystals, columnar ice crystals and flat crystal mixtures, snow crystal aggregates, frost snow crystals, ice crystal germs, irregular grains, and fern-like shapes. Columnar ice crystals and flat crystals are the shape of snowflakes that many people imagine.

Xiaoice is changed by the enlargement of small ice crystals, and the ice molecules are hexagonal for the most, so the formation of snowflakes is mostly hexagonal. The variety of snowflake shapes is closely related to the water vapor conditions at the time of its formation. For hexagonal flake ice crystals, due to the different degrees of curvature on their surfaces, edges and corners, they correspondingly have different saturated water vapor pressures, among which the saturated water vapor pressure on the corners is the largest, followed by the edges, and the smallest on the plane.

In the case of the same water vapor pressure, the condensation growth of ice crystals is also different due to the different saturated water vapor pressures on the surface, edges and corners of ice crystals. If the water vapor in the cloud is not very abundant, the actual water vapor pressure is only greater than the saturated water vapor pressure of the plane, and the water vapor only condenses on the surface, and the formation is a columnar snowflake; If the close-up of water vapor snowflakes (20 photos) is slightly more, the actual water vapor pressure is greater than the saturated water vapor pressure on the edge, and the water vapor will condense on the edge and surface, because the speed of condensation is also related to the degree of bending, the condensation is faster where the degree of bending is large, so the condensation on the edge of the ice crystal is faster than the surface, and more flakes are formed at this time; If the water vapor in the cloud is very abundant, the actual water vapor pressure is greater than the saturated water vapor pressure on the corner, so that there are water vapor condensation on the surface, on the edge, and on the corner, but the position at the sharp corner is prominent, the water vapor ** is the most sufficient, and the condensation grows the fastest, so it forms more branch-like or star-shaped snowflakes, so it is also known as six out. In addition, the constant movement of ice crystals and the changing temperature and humidity conditions in which they are exposed make the various parts of the ice crystals grow at different rates, forming a variety of snowflakes.

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