The mystery of nature, the first part of the fifth grade composition
The mysterious nature is endless, and people will get a good pleasure when they are in contact with nature. Of course, while nature gives people beauty, it also gives people more enlightenment. I remember once, I went to play in the trees of Liangfeng Ecological Park and saw a very big spider. I pushed the tree curiously and walked over. I saw the spider draw many long enough filaments on its foothold-the big branch, reaching the opposite tree, so these filaments floated in the wind, like several transparent belts floating in the sky. Then, from time to time, it touches the fixed point of spider silk with its foot. Suddenly, it found that a silk was broken by the wind, so the spider began to spin again and kept crawling between two big trees. After a while, a big net was tied up. Look, this is the mystery of nature! This also makes us understand a truth: as long as you concentrate, nothing is impossible.
Of course, plants in nature are also very interesting. In the second grade, when I was playing, my friends and I played on the grass: it was spring, and one butterfly after another was dancing near the flowers on the grass, and the air was filled with the fragrance of flowers. I lowered my head and quietly observed everything around me. Suddenly, a green dragonfly stopped on a grass, and the grass closed immediately, like a shy little girl. I pulled my mother over and asked, "Mom, what grass is this? Why have I never seen it? How strange! " ""This is a mimosa, because there is a lot of water in its leaves. As long as people touch it, the water on its leaves will flow downwards and the leaves will naturally close. " Mom pointed to the mimosa and replied. I listened and nodded.
Nature is our human teacher and has taught us a lot of knowledge. Of course, this knowledge also needs our careful observation to discover and gain something.
The Mystery of Nature The second part of the fifth grade composition
Nature has four seasons, and each season will wear different clothes, which is beautiful. Spring is coming, the grass sticks out its little head from the ground, and the frog begins to relax. Black bears and bats … don't hibernate, yawn, stretch or wake up. The little swallow and the wild goose also flew back. Fairy flowers, let all the flowers bloom, red, yellow and purple ... Nature puts on the gorgeous clothes of "everything revives"!
In the summer after spring, Anna came in colorful ways. Frogs croak, dogs stick out their tongues, dragonflies dance, lotus flowers blush, hippos roll in the mud ... In summer, nature chooses a "vibrant" green skirt!
In autumn, all kinds of fruits are ripe. Red apples hung on trees, corn with golden ears smiled happily, persimmons hung on branches and bent over with laughter ... In autumn, nature changed into golden clothes.
In winter, snowflakes flying all over the sky fall down, and all the small animals go to hibernate. The earth is covered with silver, and nature is dressed in white.
This is the beautiful and mysterious nature, and each season brings us different joys.
The mystery of nature The third part of the fifth grade composition
As the saying goes: Man struggles upwards, but water flows downwards. But * said, "I want to change the laws of nature and let the water flow upward." As soon as the voice fell, the classroom exploded and the students talked about it. Guo Jiahao shouted: "Impossible!" Liao Hao Jian pondered for a while and said, "I'm dubious." Wang Jingjing shrugged his nose and said, "I don't believe it." But I firmly believe in my heart that because * is my most trusted teacher, it is impossible to deceive people.
The challenge begins. First, we took out an ordinary plate, and the whole class laughed, because we thought it was high-tech, but it turned out to be an ordinary plate. Then, * took out another candle, which was still lit and dirty. He took out his lighter and lit the candle, dropping a few drops of wax to fix the candle on the plate. Then * let Wen Yifan, the most honest student in the class, pour some water into the cup and then pour it on the plate. Then, * told Liao to drop some ink into the plate and the water turned blue.
I'm confused. What should we do next? Wu guessed that the glass was turned upside down and the candle was covered. Gao Jiamin guessed that the cup was shaken by the candle, but how to make the water flow upward? So I stare big eyes, hold my breath, and stare at * with rapt attention. * Put the cup upside down on the candle, and then the fire goes out. After a while, the cup was full of steam, and then the water gradually rose! "It worked!" There was cheers in the classroom!
What is the principle? It turns out that the burning of candles consumes oxygen, so there is less air in the cup and the air pressure drops. The air pressure outside puts water into the cup.
Ah! Understanding nature means mastering high technology!
The Mystery of Nature The fourth part of the fifth grade composition
Nature is rich and colorful, giving people a lot of inspiration. People invented airplanes with birds and radars with bats ... I have also made new discoveries recently. One day after school, I quietly went upstairs and stood outside the door. The dog scratched at the door, but I still didn't move. He cried out in a hurry. I left quietly, and so did he. I found that dogs can tell whether there is anyone outside the door by smell. In addition, I also found that when I take my dog out, he will pee under the lamppost and beside the big tree every time he walks, and he can go home according to his own smell.
According to the characteristics of dogs, I will invent a smell lock in the future to store the smell of family and relatives in the lock. As long as you stand in front of the door, the door will open at once. If the bad guy wants to steal something, he stands in front of the door, and there is no smell of the bad guy in the lock. The door will beep and the family can see who is outside. If they are really bad people, they can call the police directly.
If the bank's money Ku is also equipped with this smell lock, the smell of all the uncles who carry money is stored in it. As long as one of them stands in front of money, money can open it.
If this smell lock is installed in the classroom, the smells of the whole class and teachers are stored in it. When students stand in front of the door, the door will open automatically. If there is no smell of you in the smell lock, if you stand in front of the door, it will beep and the TV monitor in the classroom will show the person's appearance. So the classroom is much safer.
We must observe nature carefully and use it to create beautiful things for mankind.
The Mystery of Nature The fifth part of the fifth grade composition
We live in nature, but there are many mysteries in nature. For example, why can't raw eggs rotate three-dimensionally like cooked eggs? Why can't we use up the oxygen we breathe ... The reason why we can't use up the oxygen in our lives is because there are flowers and trees that absorb carbon dioxide in the air and then use photosynthesis to produce oxygen, which makes the air fresher.
Why not? Take the middle section of the willow branch and insert it in a sunny clearing on the roadside, and the willow branch will grow into a dense willow tree. Just a force of life. It is also because willow has a good personality that she can survive anywhere. Just like us humans, no matter where you are sent to work, you can do well.
Why can't fish live on land, but in water? That's because fish breathe with gills and we humans breathe with lungs, so fish can't leave anyone. Similarly, if we go into the water without oxygen, we will suffocate.
Nature is like a big textbook. As long as you study it carefully, you will have different gains and discoveries. Therefore, at the same time, we should do a good job in protecting nature, not polluting and destroying the environment, and not deforestation. If trees are cut down wantonly, there will be no fresh air on the earth.
Let everyone know that destroying nature is an out-and-out act! If you wantonly destroy nature, you will be punished by nature!
If you want to get mysteries and laws from nature, you must first know how to protect nature!