Science means a knowledge system which reflects the objective laws of nature, society and thinking. The science around us is everywhere, all the time. For example: why do people leave? Why can a bicycle move forward? Why do computers work? wait. There are so many sciences that we don't even know why? If technology is developed in the future, will aliens come to earth? How will the earth become extinct? Today, let me tell you, why do frogs only eat moving flies and turn a blind eye to dead flies? Ha ha, the frog is known as "thousand mile eye". Its eyes are particularly sensitive to distant objects, such as mosquitoes and flies. When they pass by, it will shoot its red tongue like an arrow, bind up its prey, take back its mouth and taste the "feast". It only takes a short second to complete this action! When catching insects, frogs have the ability of "hitting a hundred targets". The reason is that there is a kind of cell in their eyes that can respond to moving objects. This kind of cell can be judged according to the continuous movement of objects. However, they turn a blind eye to static objects. No matter what, in the face of static objects, they just can't see! If it's a dead fly, just tie it to a thin thread and tease it repeatedly in front of the frog, so that the frog will eat the dead fly obediently. In our side, there are many such interesting things, waiting for our insight to discover. Science is everywhere and everywhere! Finally, I would like to offer you a famous saying of Mao Zedong: natural science is a weapon for people to fight for freedom. The science around us a few days ago, I took a bath at home. The bathtub was full of water. I was soaking comfortably in it and humming a tune. Just when I was happy, suddenly a drop of cold water fell on my nose, which scared me. What's the matter? I looked up at the ceiling and found that there were many small drops of water densely arranged on it, and a few drops were falling down. I didn't understand what was going on, so I invited my father in, because he knew everything. He asked him if he knew. My father said: 'the water drops on the ceiling are steam from the bathtub. When the ceiling gets cold, it will dew, and the surface of the ceiling is very smooth, so it will gather more and more, and it will fall down at a certain time. '
'Oh, I see. 'as I wash, I think: dropping water on the ceiling will make the bather feel uncomfortable. How can I keep the ceiling from dropping water? I have an idea in my head - if the ceiling of the bathroom is arched, the water droplets formed on the ceiling will flow down the arch to the bottom, and then make a small sink at the bottom of the arch, connect the water pipe to the sewer, so as to completely eliminate the phenomenon of water droplets falling from the ceiling when taking a bath. Yes, that's it.
In the evening, I told my father the idea. After listening to it, my father said: 'shall I take you to the sauna today? "But I've already done it. Tomorrow? "No, just go today, and you'll understand. 'I don't know what's in my father's gourd, so I had to follow him. But when I got to the sauna center, I understood, because the ceiling there was arched, and the water on it flowed down the beautiful dome. I scratched my head and said with a smile:' so that's it. I understand. "Dad patted me on the shoulder and said: 'smart! This is the science around us. Scientific principles are everywhere in our lives and are closely related to our lives. Therefore, you should study hard and master more knowledge to meet new challenges. '
I didn't expect that we still have so much science around us. Science around composition science around composition
Class 3 (5), Jingmen experimental primary school, Hubei Province
Ouyang Ziqi had snowed for several days, and finally the sun came out. My mother and I are sitting on the sofa in the living room, lazily basking in the sun. Suddenly, my mother asked me, "why does the solar energy shine in from the south window in winter? Why does the summer sun shine in through the North window As soon as I heard it, I immediately remembered the story told in 100000 whys, and I told my mother the knowledge in the book. Mother laughed and said, "let's do this experiment." We use electric light as the sun and the ball as the earth. When the "Earth" revolves around the "sun", sometimes the "sun" direct light to the north of the "Earth", sometimes the "sun" direct light to the south of the "Earth". My mother told me that we live in the northern hemisphere of the earth. When the sun shines directly to the north, it is our summer, and the sun can shine in through the North window. When the sun shines directly to the south, it is our winter, and the sun will shine in through the south window. It seems that as long as we pay attention, knowledge is everywhere! How good it is to read more books! Liu Qian: let's go home together! 'guess who's calling me? Can't guess! That is my good friend and best friend Zhang Xinyue. She is the deputy leader of the school brigade! Academic performance is one of the best! She not only excels in school, but also loves children outside school!
'Liu Qian, hurry up! 'ah! She's calling me. Let's talk while we walk!
When it comes to her being out of school, it's a big story!!
I remember that time, we went home together again. After we got on the No.8 bus, we sat in a good seat and chatted with each other. When we were talking about the impromptu conversation, an old woman over 50 years old crowded into the No.8 bus by turning left and right, and stood on the bus shaking from left to right, which was very unstable. I watched it and did not look back to continue to chat. After Zhang Xinyue saw it, she stood up without thinking, waiting for me Back to God, she had helped her to the seat. The old woman's Bronze face suddenly showed a bright smile and couldn't close her mouth. After looking at it, I couldn't help feeling a sense of guilt. A fire burned from my heart to my face, hot. composition
Zhang Xinyue not only respects the old and loves the young, but also takes good care of environmental sanitation.
At that time, we were walking to the station. I bought a small bun. After eating it, I threw the plastic bag on the ground. Zhang Xinyue looked at me with a smile and said: 'it seems that I saw a man throw a plastic bag around just now! 'I stopped, looked left and right, and thought. Isn't that who I am? I felt the back of my head and picked up the plastic bag on the ground. Zhang Xinyue looked at it and said aloud: 'don't do it again next time! If you think about it, how hard the cleaners are...'Ah! She loves the environment so much! composition
Now you know our real Deputy brigade leader! She loves respecting the old and the young, learning, environment and Science... Wu Shaoping, the teacher beside me, is a good teacher. Her name is a household name. There was once a teacher who taught my third grade. I will never forget this teacher. She is a good teacher, and she is also the 'Wu Shaoping' in my mind.
When the second grade is not outstanding, I stepped into the third grade, three (4) class gate, I felt at a loss, because the third grade is a turning point in primary school learning, and I began to worry about my performance. At this time, the head teacher came, she is also my math teacher. The face of charity, amiable she, always with a smile, let me feel very warm. I gradually like the teacher.
At the beginning, the teacher's lecture deeply attracted me. If the teacher asked me a question, I could quickly respond and give the answer, but I didn't have the courage to raise my hand and answer aloud. The teacher seemed to know that I would, so he looked at me with encouraging eyes. After a long time, when the teacher saw that I didn't raise my hand, he embarrassed me and called me to answer this question. I stood up and answered in a trembling voice. When I finished answering, the teacher turned to the students and said: 'Wang Chenxi's answer was very good. Let's give her applause. 'thunderous applause immediately broke out in the classroom. I'm very happy. From then on, I don't have the fear of answering questions like before. Slowly, my excellent answers can always be shown in the classroom, and every time the teacher will praise me. Once, the teacher said in class: 'Wang Chenxi's thinking is very active. You can ask her what you don't know and learn from her more. 'This sentence gives me more encouragement and makes me more confident, so I will never forget it. I've learned that if you want to make outstanding achievements, you must have self-confidence, which is the prerequisite for success.
She is not only good to me, but also responsible to other students. composition
She works very seriously and checks every assignment very carefully. Once the teacher assigned the title of the book, and one of the students thought it was the team leader's inspection, so he didn't pay attention to it. I went to play after I finished it so carelessly. Class, but the teacher personally check! Check him, the teacher took a look at the book, I thought: he finished this time, no singing. After reading his homework, the teacher's face became ugly and looked at him with frightened eyes, which made me worry about him. We all saw that he was staring so red that he said, 'what's the matter? What's the matter? What's the way it's written'? The teacher growled at the classmate. He bowed his head and replied: 'I'm in a hurry. I didn't write it well. "I didn't write it well. I reviewed it." I can't help it. He nodded honestly. I thought: the teacher's inspection is really careful, really responsible!
Although she may not remember me, but I will never forget her, because she taught me a lot: knowledge, the truth of life, and so on, the most important thing is that he taught me to have self-confidence, is that I have a greater academic glory in the future. Her teacher is Xi Chunrong! Teacher: Thank you! You will always be my 'teacher Wu'! composition
If I were a great cloning scientist, with the birth of Dolly, a cloned sheep, people would be surprised, happy and worried. Since then, cloning technology has set off a frenzy.
If I were a great cloning scientist. I want to clone a sea of thick green forest. Because, with a large number of human deforestation, forest coverage is gradually decreasing, resulting in some ecological disasters that should not have happened: sandstorms. Debris flow and desertification in some areas & hellip; & hellip; hurt some innocent people. I once saw such a news: a small village in a certain area, because of too much rain, there was no vegetation in the surrounding rocks, so it caused a debris flow, which inundated the village overnight, more than 9 meters high! I can't bear to let it happen again. So, I want to clone one tree after another, one forest after another, green our environment, green our home. The content of this page is pushed by "Sihai reading network"
If I were a great cloning scientist, I would clone every organ in the human body. Around, there are countless people who can never see the colorful world and can only live in the dark; there are countless people who can never listen to any wonderful voice in the world, but can only live in the silent world; there are countless people who can never listen to any wonderful voice in the world