When water molecules arrange themselves into solid snow or ice, snowflakes reflect the internal order of water molecules. When water molecules begin to condense, they form weak hydrogen bonds with each other. The formation of snowflakes (and the process by which all substances change from liquid to solid) is called crystallization. Molecules are arranged in the lowest energy state, which makes the attraction between them maximum and the repulsion minimum. In the water ice on the earth, each molecule is connected with the other four molecules through hydrogen bonds, forming a lattice structure.

Therefore, water molecules will move to the specified space. The most basic shape is a hexagonal cylinder, with hexagons up and down and triangles. This arrangement process is very similar to tiling: once a style is selected and the first tile is placed, all other tiles must be placed in the decided position to maintain the style. When water molecules settle by themselves according to the low energy position, they will fill the gap and maintain the contrast; This is how the "arms" of snowflakes are formed.

Snowflakes come in many forms. The reason for these differences is that snowflakes are generated in the atmosphere, and the atmospheric conditions are complex and changeable. A snowflake crystal may be formed in a certain way, and then it will change relatively according to the changes of temperature and humidity. The basic hexagonal symmetry still exists, but the ice crystals will develop in a new direction.

Question 2: What does a snowflake look like? Look carefully and write down snowflake: a crystal whose structure changes with the change of temperature. Also known as Weiyang Flower and Liuchu, it is a beautiful crystal that clings together to form snowflakes in the process of falling.

1, snowflakes all over the sky, fluttering in the wind, like lovely snow dolls, jumping down naughtily, like little fairies, wearing white skirts, light; Like white flowers.

2. Snowflake is like a flying butterfly, and her "wings" shine with joy, as if crystal snowflakes were scattered on the earth, letting the earth rest under the soft bed curtain. Pregnant with the growth of the new year.

Snow is still floating in the sky, floating. I use painting to leave snowflakes. One stroke, two strokes, the snowflake is magnified by me. Uh, not enough. I picked up the camera and took pictures of snowflakes and snow. Snowflakes seem shy and drift to the other side with the wind.

4. Snowflakes are fluttering, and I look up at the sky. Snowflakes fall like feathers. Snowflakes float on students' heads and become shiny little silver hats; Snowflakes floated into the mushroom pavilion, and the stone mushrooms seemed to have life and danced. The air seems to be filtered by snow, so fresh, with a pure and true natural beauty. Snow brings life to everything, it makes everything pure, and the earth and everything need snow, which is inseparable. Where snow falls, it will become beautiful. Snowflakes are fluttering, snowflakes are fluttering, making the world a better place.

Snowflakes are falling quietly. Snowflakes flying all over the sky, one after another, like dandelions all over the sky, and like countless young and indescribable lives, tremble, fluctuate and ripple in the boundless night sky. The expression is so pleasant and the change is so magical. Jing Tian seems to feel that there is a big white wing hidden on the earth. Before you know it, it is a vast expanse of whiteness.

6. Snowflakes are unpretentious and obscure. Snowflakes never care about fame and fortune. They are simple and happy. This is the spirit of snowflake.

7. Snowflakes fall on the trees and put a white sweater on the branches of Ilex, which is beautiful in winter. White snow hung on the branches, furry. If you don't look carefully, you'll think it's a beautiful ornament inserted there. This spectacular sight can't help but remind you of two famous poems: "Like the strong wind in spring, it comes at night and blows open the petals of ten thousand pear trees."

8. Snowflakes are white and pure. They also make the earth very pure and beautiful. I have a feeling that snow not only makes everything pure, but also makes people's hearts as beautiful and pure as it.

9. Snowflakes bring us endless fun. Back home, I quietly looked at the snow scene. It suddenly occurred to me that jewelry brings people face, while snowflakes bring people endless joy. Although snowflakes are not as gorgeous and dazzling as jewelry, they bring people something more precious than face money, that is, heartfelt happiness. It is better to have happiness than to face money.

10, Snowflake is the world's "makeup artist" and a good partner of our children. When the snow covered the earth, we all rushed out of the house, played in heaven, made snowmen and had snowball fights ... all the laughter made this frozen world full of vitality. Snowflakes kept flying down and landed on children's heads, shoulders and feet. Ha! It's all Santa Claus! Grab a snowflake gently and it will soon disappear into a pool of shiny water. Touching your face a little will make you feel particularly comfortable, which has never been so comfortable!

1 1. Snowflakes are as elegant as butterflies and as white as dandelions. How beautiful!

12, snowflakes are flying in the open air, as if to say with a smile, "Friends, let's dance together!" ! Come on! A few snowflakes are flying in the sky. Very happy, slowly drifting down. Seeing that I was about to land, I caught the "flying snowflake" with both hands. Snow fell on my handicrafts, and I felt a little cold, but I felt warm when I saw such pure and beautiful snow. Magic snowflakes, shining in the sky, are particularly bright. Hexagonal snowflakes are shining with silver, like little stars in the sky.

13, the snow floated leisurely, rendering the world a vast expanse of whiteness. It is not surprising that catkin-like snow, reed-like snow and light smoke-like snow are flowing, chasing and coming spotless. One hexagonal flower after another, beautifully carved, without any repetition. Carve jade with powder, but which artist can design such delicate lines? Who can carve such exquisite handicrafts? Rather than being a masterpiece of nature, I would rather believe that it belongs to a fairy in the heavenly palace ... >>