The power of knowledge: 800 words and 5 compositions in Grade Three.

1. The power of composition knowledge in grade three is 800 words.

Knowledge is accompanied by human growth, and human growth is indispensable.

Since ancient times, people have continuously enriched their knowledge: from oil lamps to electric lamps to shadowless lamps, from swords to firearms to bombs, from hot air balloons to airplanes to rockets ... It is precisely because people have continuously enriched their knowledge and mastered their skills that people can survive in nature. We are not as big as mammoths; No cheetah runs fast; There is no deadly venom; Without sharp teeth ... What do humans live on? It is knowledge! Guns let us discipline wild animals; Planes let us soar in the sky; Ships let us swim in the ocean ... It is said that Zhuge Liang borrowed the arrow of the grass boat and borrowed the east wind skillfully, but he applied his knowledge to strategy. In fact, Zhuge Liang can observe the astronomical phenomena, and he can clearly know when it will be foggy and when it will be easterly ... It can be seen that the power of knowledge is so great! We use knowledge to save lives and manage the environment ... knowledge is everywhere!

Now, what we can do is to enrich our knowledge and learn knowledge for the prosperity of our motherland!

Mark Twain once said: "There were two strange people in the19th century, one was Napoleon and the other was Helen Keller." I recently read an autobiography about Helen Keller-"If you give me three days of light". After reading it, my heart was shocked by the spirit of Helen Keller. She spent 87 years in the dark. If it were anyone else, they would not be able to bear the burden of family for a few days, and Helen Keller created a myth with her courage in life.

Helen Keller wrote in her book: "Knowledge gives people love, light and wisdom. It should be said that knowledge is happiness, because with knowledge, we will feel the pulse of human activities in history, otherwise we will not understand the music of human life! " Indeed, the power of knowledge is infinite, and it is knowledge that makes Helen Keller create these myths.

Helen Keller is unfortunate, but she is so lucky because she has knowledge. After she lost her sight and hearing for 19 months, she lost communication with the world, and she became eccentric, rude and rude. It was not until her Sullivan teacher came into her life and taught her to read that she opened her eyes and was able to communicate with others.

In this world, why do only deaf people cherish the joy of seeing the world again? Let's cherish every day of our lives, enrich our lives and enjoy them. Helen Keller said: "The purpose of my efforts to acquire knowledge is to contribute to society and mankind." How powerful knowledge is, it can make a disabled person become a useful person to society. Each of us should, like Helen Keller, enrich ourselves with knowledge and become a useful person to society.

2. The power of knowledge 800 words for the third grade composition

Everyone has endless power, but when this power is mobilized, our power comes from many kinds, such as the power of dreams and the power of love. My strength comes from knowledge. In all kinds of books, in the vast book kingdom, I can fly freely, browse and read all the time, and increase my knowledge. My knowledge can grow up like a small tree, be as beautiful as a flower, and cure diseases like a pecker.

In my home, there are all kinds of exquisite books. Every time I finish reading a book, I seem to be stuck in the toilet. Sometimes I only eat one meal a day. If you come to my home, you will find that my books have many colors. If you look carefully, I posted those colors myself. Why? Let me tell you something:

The little red book is an extracurricular book. When I am free, I will pick up a red book to read. There are many kinds of fairy tales, fables, famous sayings, life truths, knowledge truths and so on. I have to read a book almost four times. When reading a book, it will be very annoying, because when reading a book, I will devote myself to the content of the book, regardless of what to eat or attend class. Sometimes even hitting me two or three times is still crazy. There are also blue books on the bookshelf, which are generally military. You can know how many soldiers spent their time under hard training, and you can also know some tanks, planes, guns and so on. This is my favorite. I know that the European battlefield is 1 September, 9391,Poland strikes Germany and signs its surrender1May 8, 945. There is also the Asian battlefield from1Lugouqiao Incident on July 7th, 937 to1June 5th, 9458 when Japan surrendered. What about this knowledge? These are purple books. Purple book refers to the subjects in the class, and all the subjects in the class are in it. Even students in Grade 12 and Grade 12 sometimes flip through books that are higher than my grade. I like Chinese and math best, so I have more books about Chinese and math. Yes, there is a little red book. The little red book is about sports, and I am very interested in sports.

Oh, I like Taekwondo best. Really handsome. I watch every taekwondo competition and swim. I watched the video to learn the movements myself! My hobbies are violin in music, taekwondo in sports, table tennis and swimming. I play table tennis very well, with the signature of a table tennis star!

What do you think after introducing these colorful books? You can get so much knowledge in muddy books. Do you think knowledge gives me strength? I think the power of knowledge is the greatest and deepest. No one can break through it. The door in front of the book is like an old friend of the book. I often regard books as my friends, because books are like my home and my friends. They always accompany me.

The power of knowledge is like a lamp, which illuminates us every day. It's like a sun. With the sun, there is hope and strength! Knowledge is like a white flower, fragrant and powerful!

3. The power of knowledge 800 words for the third grade composition

During the summer vacation, my mother took me to the China Science and Technology Museum, where I benefited a lot.

The main exhibition hall on the first floor, "Light of China", tells the great achievements made by the Chinese nation in the scientific field in the past five thousand years. China had learned mining, timing, textile and astronomical observation as early as the Han Dynasty. In addition, China's agricultural production technology at that time also reached the advanced level in the world.

In the center of the "Light of China" exhibition hall stands an ancient hydraulic turbine simulation model, only to see that under the action of water flow, a turntable rotates rapidly, driving a huge coaxial gear to rotate, while the other two smaller gears clamped with this gear also rotate in the opposite direction. The centers of the two mallets are respectively clamped on a wooden stick, thus forming two labor-saving levers, and the other end is on the pinion. When the teeth of the pinion leave the lever, the hammer of the lever hits the grain heavily under the action of gravity and works circularly.

China geographer Zhang Heng invented the seismograph in the Eastern Han Dynasty. It is the earliest earthquake prediction instrument in the world, full of high technology in modern society. The earthquake predictor made by scientists is also made by imitating Zhang Heng's seismograph principle. And it's almost two thousand years late!

China's ancestors had already mastered the astronomical phenomena and divided the constellations into four galaxies: Suzaku, Qinglong, Baihu and Xuanwu. Centuries before the discovery of the western twelve constellations.

My mother and I can't help but admire and be proud of the wisdom and hard-working hands of our ancestors!

In the Science and Technology Museum, something happened that impressed me deeply: in the exhibition hall of "Technology and Life", there was an experience game of "gas shooting". The rule is that the experiencer holds a blower, and if he can blow the basketball into the basket, it is victory. I am also gearing up and eager to try.

However, the facts always backfire. Although I tried to blow the ball into the basket, it was very disobedient. One minute it fell in mid-air, then suddenly flew over the basket and hit the wall. Seeing that it was time, I didn't play a ball.

I walked away in frustration. Suddenly, I noticed a poster on the wall with a scientific law about gas velocity written on it. I immediately understood why I missed: the greater the gas speed, the smaller the pressure; The smaller the gas velocity, the greater the pressure.

If we have no knowledge, we can't even play a game, can we? Therefore, learning is a must for everyone!

4. The power of knowledge 800 words for the third grade composition

Mark Twain said: "In the 19th century, there were two strange people in Florence, one was Napoleon and the other was Helen Keller." But I admire Helen more. Keller, her spirit shocked the whole world, and her masterpieces nourished the hearts of generations.

Helen Keller lost her sight and hearing because of illness when she was nineteen months old, and soon lost her ability to express herself in words. Darkness and loneliness made her surly and naughty until Miss Sullivan came into her life, taught her to read and talk, and opened her eyes to communicate with the outside world. From then on, Helen was eager to know more about the wider world. She can't wait to read and read, absorbing knowledge like a sponge. The thirst for knowledge enabled her to overcome the unimaginable difficulties of ordinary people with tenacious perseverance, mastered five languages: English, French, German, Latin and Greek, and graduated from Radcliffe College in the United States with excellent results, becoming the first blind and deaf person in the world to complete university education. She traveled all over the United States and other parts of the world, raised funds for schools for the blind, and devoted her life to the welfare and education of the blind, winning praise from people all over the world.

Helen said in the book: "Knowledge gives people love, light and wisdom. It should be said that knowledge is happiness, because with knowledge, we will feel the pulse of human activities in history, otherwise we will not understand the music of human life! " Yes, knowledge is power, and it is knowledge that makes Helen create these miracles on earth! Helen compared learning to climbing a strange mountain and a dangerous mountain, and then climbing it after falling. Every time she makes progress, she is encouraged to see the wider world gradually until the bright clouds, the depths of the blue sky and the peak of hope. It is this knowledge that illuminates Helen's inner world like a lighthouse, builds a bridge between Helen and the outside world like a rainbow, and carries Helen across the stormy waves like a boat to the other side of success.

Knowledge is power, but the process of acquiring knowledge is long and arduous. Knowledge has given Helen an unparalleled wonderful life. As a blind and deaf person, her efforts are unimaginable. We have good health and good study conditions. It is an unforgivable waste to give up the pursuit of knowledge because of fear of difficulties.

Knowledge gave Helen strength and she passed it on to me like a baton. As a student, my ears are always full of complaints about hard work. How should we face the invisible pressure and heavy learning tasks? In the face of difficulties, should we give up this difficult climb or go ahead? Rereading Helen Keller's works, she once again gave me the determination and courage to overcome difficulties. I firmly believe that as long as we never give up the pursuit of knowledge, the bright future must belong to us.

5. The power of knowledge 800 words for the third grade composition

From ancient times to the present, China is a country with the most cultural heritage. From Confucius to Mao Zedong, from Laozi to Zhou Enlai, the cultural strength of the Chinese nation is reflected. As descendants of China people, how much do we know about these?

Recently, a school competition is in full swing, that is, "Chinese and Music Cup Knowledge Competition". The contents involved in this competition are all about the common sense of Chinese and foreign literature, such as Laozi, Mozi, Confucius, Mark Twain, Tolstoy and Mo Bosang. We usually have little contact with them, let alone know them, so it is a great challenge for us. Everyone goes all out to prepare for the war, and of course I am no exception.

In order to help us, Mr. Zheng arranged some literary knowledge for us according to the examination requirements, a4 paper 10 page. To tell the truth, these contents are really difficult to understand, especially the works of writers with strange names. Although I scratched them one by one with a highlighter, I still forgot the front of the back. Remember the front and forget the back.

Somehow, Ms. Zheng later heard that our junior high school quality test might get these contents, and she was already serious. This time she is more serious. She divided the ten pages into five parts, supervised our recitation every day and checked our memory every day. Everybody's back. Everybody's nervous.

I remember one day, Mr. Zheng asked me to recite the second part. Because I was delayed the day before, I didn't spend too much time in customs clearance, and my palms were sweating with nervousness. Watching the students succeed one by one, I desperately memorized.

"Pan, why don't you come up? Even xxx has been recited. What's wrong? " Teacher Zheng stared at me seriously, and I went up obediently. The front part is ok, but it gets stuck when we get back to the third question. I'm so nervous, I wish time would disappear at this moment.

"Pan, only five students in the class didn't recite it. You are one of them. Do you think about it? " In the teacher's criticism, I returned to my seat in shame.

In the following days, I remember classes and set myself the task of reciting memories every day. No matter what the reason, I will remember it firmly. It didn't take long for me to recite most of the five parts. If someone mentions "four outstanding figures in the early Tang Dynasty", I will blurt out: "Wang Bo, Yang Jiong, Lu and Luo." If someone mentions Hugo, I will say Notre Dame de Paris and Les Miserables ... Sometimes, I will be a teacher's mother. Many times, I actually found that many mothers who claimed to be "well-informed" actually couldn't answer!

"Start answering questions!" The day of the competition came. When the teacher gave the order, the classroom was silent, only the rustle of the pen tip was heard. Although many topics are the same as the competition, I am still not sure, but I know that I am sure of many contents.

The game is finally over. Can I win the prize? Occasionally I think. But more often, I think winning a prize may not be the most important thing. The experience of this competition made me know the importance of accumulation and the truth that "knowledge is power" and "knowledge brings confidence".