The revelation of nature fourth grade composition

No matter in study, work or life, everyone is familiar with composition. According to different genres, composition can be divided into narrative, expository, practical and argumentative. What is the composition you have seen? The following are four essays on the revelation of nature that I collected for you in the fourth grade. You are welcome to learn and refer to them. I hope it will help you. Enlightenment from Nature Composition 1

Human beings have got a lot of inspiration from nature.

For example, people have successfully developed an electronic frog eye according to the visual principle of frog eye. This kind of electronic frog eye can accurately identify objects with specific shapes like real frog eyes; According to the principle of bat ultrasonic locator, people also copied the "pathfinder" for the blind. This pathfinder is equipped with an ultrasonic transmitter, with which blind people can find poles, steps, people on bridges, etc. Nowadays, "ultrasonic glasses" with similar functions have also been made?

human inventions-inspired boats and submarines from animals come from people's imitation of fish and dolphins. Scientists made the first batch of gas masks in the world according to the unique ability of detecting poison by the nose of wild boar. The rocket took off using the recoil principle of jellyfish and cuttlefish. Researchers have developed a lot of military camouflage equipment for the army by studying the chameleon's color-changing ability. Scientists studied frog eyes and invented electronic frog eyes. The US Air Force has developed a miniature thermal sensor through the "hot eye" function of poisonous snakes. Humans also used the principle of leapfrog to design a toad ram (hāng). Humans imitated the highly sensitive sense of smell of police dogs and made "electronic police dogs" for detection.

Bionic and high-tech modern radar, a radio positioning and ranging device: Scientists have found that Bat Magic relies not on eyes, but on an echo positioning system consisting of mouth, throat and ears. Because Bat Magic sends out ultrasonic waves when flying, it can also detect the ultrasonic waves reflected by obstacles. Based on this, scientists have designed a modern radar-a radio positioning and ranging device? Scientists invented artificial dolphin skin which can improve the speed of torpedo by studying the small swimming resistance of dolphins. And a wheelless car (jumping machine) that imitates kangaroo's movement in the desert.

inspired by the Penguin King, scientists from the Institute of Zoology of the former Soviet Academy of Sciences designed a new type of automobile-the "Penguin King" brand polar off-road vehicle. The broad bottom of this kind of car is directly attached to the snow surface and propelled by a wheel spoon, and the driving speed can reach 5 kilometers per hour?

this is the inspiration from nature. The Revelation of Nature The Revelation of Nature by Fireflies Grade 4 Composition 2

On that sunny morning, I rode my bike and shuttled on the garden path. I parked my car in the square downstairs, and I was about to play, but before I knew it, I saw a group of things crawling towards me not far away.

because I didn't understand what it was, I walked towards that dark thing. Take a closer look and realize that it was originally an "ant army" composed of tiny ants.

"What are those ants going to do? Where are they going? " I have doubts in my heart. After careful observation for a while, I found that the strength of an ant can't lift large food, while most ants can lift large food together. In this way, the question is solved: ants are moving food. They want to find a nest and put the food they find into the nest.

The unity of ants inspired human beings to invent a game, that is, tug of war. This game allows people on the same side to unite, cooperate and pull the rope over.

The unity of ants makes people admire and inspire. They are like the army, invincible; Like grass, persistent; Like armor, indestructible! The spirit of unity of ants is worth learning. Revelation from Nature Composition 3

I get inspiration from wolves. To make ourselves strong, we need to be wolf-like. Wolves have many natures, especially the Wolf King, who will lead wolves to hunt. If a wolf gets lost, it will send out a cry as a distress signal. When the Wolf King hears it, he will first judge the position of the sound, and then lead the wolves to find it. They love and help each other, although they look fierce.

I invented a machine according to the wolf's nature. Because it looks like a wolf, I named it "robot wolf". But there is also a mechanical wolf king, who mainly controls my mechanical wolves. The mechanical wolf has claws under its neck, which are very sharp and can scratch human skin instantly. The legs of the mechanical wolf are wheels with springs in them, which can make it jump and attack each other better.

if you have this kind of machine at home, it will be of great use. Those mechanical wolves will be distributed in every corner of the family by me. The mechanical wolf king will be arranged near the door of his house. If a thief enters, the mechanical wolf king will immediately send out to attack the other party. Not only that, it will also give an alarm, let all the mechanical wolves gather here and attack the thief together until the thief is defeated. At the same time, the mechanical wolf king will also issue an alarm to the owner.

is the mechanical wolf pack I invented awesome? Do you like my invention? The revelation of nature 4

In the mysterious nature, people often get inspiration from animals and plants and invent many things.

My father is a photographer, and under his influence, I have a certain understanding and curiosity about photography. Once, when I was fiddling with my father's camera, I accidentally pressed a button and took six photos at once. I don't understand: why did you take six almost identical photos at once? I asked the "photography expert" with questions, and he said, "You pressed the continuous shooting function key!" "wow! It has such a magical function! " I can't help sighing. "This is not bad!" Dad said, "There is another kind of camera called compound eye camera, which can take hundreds of photos at once!" " My habit of "a hundred thousand whys" has been broken again: how was the so-called compound eye camera invented?

through the inquiry, I found that the dragonfly's eyes are closely related to the compound eye camera. Because it was invented inspired by the eye structure of dragonflies. Dragonfly's eyes are unique. Each eye has thousands of small eyes closely arranged, all of which have light focusing system and sensory cells, and have certain vision. This strange eye is called compound eye. The compound eye structure is very strange: it can see far and near at the same time. In this way, when dragonflies catch small flying insects, they hit every shot. Scientists invented the compound eye camera according to the eye structure of dragonflies, and it was widely used.

The compound eye camera will be potentially used to develop surveillance cameras or surgical endoscopes. It can also be used to rescue disaster areas ...

Nature has endless mysteries, waiting to be discovered and explored by human beings ...