Excellent scientific composition 1 Hello everyone, I am a future scientist. I invented tens of thousands of unexpected machines in my life, which solved many mysteries for mankind and made the earth better and the society more peaceful.
I invented the time-space reverser, and let people know all kinds of mysteries from ancient times to the present, such as how the Yellow Emperor and Yan Emperor came and how they lived. How did Yang Guifei die? Was she hanged in Mapoling? ...
I invented the psychological converter, sending out computer particle shock waves to delete people's bad thoughts and qualities and inject good thoughts and qualities.
I invented the green emitter. This machine first designated deserts, disappearing forests and heavily polluted places with green electronic particle icons on the computer. Then send the electronic map made of pictures to the satellite, let the satellite emit green electronic waves, let large areas of plants grow in every corner of the world, and turn them into green oceans.
I also invented the gene death vaccine to make people live longer and make their families happier.
Of course, I have many inventions. Today, however, these inventions are still beautiful dreams, but I will study hard to make them come true. I firmly believe that what I wrote on this paper today is not a fantasy, but a new page in the history of human future inventions!
The summer vacation has begun, and I feel bored every day. It was not until my brother and I succeeded in the first experiment that I felt happy in the summer vacation.
It was very hot that day. My brother came to my house and said out of breath, "Sister, help me, I don't understand?"
"good!" I definitely said yes. After reading the homework, I realized that it was necessary to put the eggs in white vinegar for a period of time and observe the situation. I took my brother to do the experiment meticulously. Nothing happened at first, but there were a few bubbles in the vinegar, and the eggs seemed to be elastic the next day. In doubt, we flipped through the encyclopedia, which said: Eggs soaked in vinegar will react with vinegar, and eggshells are calcium carbonate, which is hard and insoluble in water. There is acetic acid in vinegar, and calcium carbonate will react in acid to produce calcium acetate and carbon dioxide. Calcium acetate is soluble in water, carbon dioxide is a gas, and eggs will become soft. Acetic acid in vinegar reacts with calcium carbonate in chicken skin to soften chicken skin. After reading these, we suddenly realized that it was like this!
Now, I think science not only contains a lot of knowledge, but also is everywhere!
Excellent scientific composition 3 Today, Mr. Fu gave us a lively and interesting scientific experiment class. The topic is: how to make the balloon swell? Ingredients: white vinegar, baking soda, balloons, mineral water bottles. At the beginning of the experiment, I saw Mr. Fu. First, he poured white vinegar into an empty mineral water bottle, and then he poured baking soda into a balloon. Then buckle the balloon in the mineral water bottle and let it stand upside down.
I saw baking soda slowly entering the white vinegar. At this time, the balloon began to get bigger slowly, which was amazing. We all cheered and applauded. Why is this happening? Pay the teacher to put away the tools and explain them to everyone. When baking soda powder is mixed with white vinegar, carbon dioxide will travel, and the balloon is sealed, so the generated airflow will rush upwards, and the balloon will slowly expand itself. It turned out to be so interesting that I decided to go home and do this little experiment by myself.
Excellent scientific composition 4 After careful preparation by the students, the colorful class and team class "Changes in Science" has been freshly baked under the eyes of the students.
"We are the successors of capitalism." After singing the team song, first of all, Yamazihang took his own scientific experiment to the stage. Hey, why are there only a few books piled together? How can you conjure up a little science? A big question mark appeared in my mind. The host seemed to see our thoughts and asked two "Hercules" in our class to take the stage to open these two books. I was curious, so I went up and became an inspector. When I took a closer look, I saw them stacked one by one, without any traces of watering. Some people say that it may be because of the pressure between books, while others say that students are talking.
More exciting is yet to come!
Look! The tortoise and rabbit race is about to start again. Liu Chao came up with two bottles. An empty bottle is a rabbit, and the other bottle full of water is a turtle. At the referee's command, two bottles rolled down at the same time. Finally, the tortoise won the championship. It not only runs faster than the rabbit, but also runs much faster than the rabbit. What a wonderful experiment!
Science is the guide of our life journey.
If I were a scientist, I would invent a car that can fly in the sky, swim in the water and run on the ground.
This kind of car is amazing. There are three kinds of buttons in the car, namely red, yellow and blue.
If you want to fly in the sky, just press the red button and wings will grow on both sides of the car and rise slowly. Then you can operate the steering wheel and travel in the sky.
If you want to swim in the water, just press the blue button, the car will become a submarine, and then you can visit in the water.
If you want to run on the ground, just press the yellow button and the car will return to its original appearance and run faster than the ordinary train.
The cars of the future are great. We should study hard and our future dreams will come true.
If I were a scientist, I would invent a universal car for sea, land and air, so that people can travel conveniently, and this car can harvest a box for people to carry, and this car is powered by water, so the exhaust gas is oxygen, which will not cause air pollution.
If I were a scientist, I would invent a laser therapeutic instrument, which can effectively treat cancer patients and make them less painful.
If I were a scientist, I would invent a medicine for regret and give those who regret it a chance to start over.
If I were a scientist, I would invent many robots, let teachers have a good rest, and let robots change their homework and prepare lessons.
If I were a scientist, I would invent a time-space machine to let people go back to the past, explore those unsolved mysteries and see the future clearly.
If I were a scientist, I would … ..
From now on, I will study hard. When I grow up, I will become a scientist and make greater contributions to my country.
I wish I were a scientist!
Today, my mother and I did a small scientific experiment called fire extinguisher. The preparation materials are as follows:
Glass (two), candle (a small piece), match (a box), spoon (a handful), baking soda (a little) and vinegar (a little).
First, put the candle in the first glass and light it with a match.
The first cup
Second, take a spoonful of sodium bicarbonate, put it in the second glass, and add a little vinegar. After careful observation, it was found that the white powder began to bubble, producing a gas. (I used white vinegar) Red vinegar would be better.
The second cup
3. Gently pour the contents of the second glass into the first glass.
I found that the candle went out soon.
This is because:
Sodium bicarbonate reacts with vinegar to produce invisible gas carbon dioxide. Because it is a non-combustible gas, when they are used to surround the candle flame, oxygen is prevented from entering and the flame is extinguished.
Carbon dioxide is heavier than air and will sink to the bottom of the cup when inverted.
If I tell you, you can take learning as fun, not only you can have fun, but also your learning efficiency is doubled. Can you believe it?
Here, you can walk into our nature library, get to know the beauty of nature, board the health express, enjoy a healthy and happy life, and feel the way of keeping in good health with us, and ...
In this book, I realized many mysteries of nature and the tacit understanding of the actors, which really improved my ability, intelligence, cooperation and creativity!
In Secrets of the Brain, I learned that I should take more exercise and eat more fruits, vegetables and carrots, otherwise, it will seriously affect my brain. In "The New Home of the Hippocampus", I learned that the task of incubating and raising the little hippocampus was handed over to the hippocampus father!
Of course, that's not all. In so many scientific stories, I have realized a lot of truth, constantly flying in the mysterious nature and flying happily.
This book let me know the importance of rehearsal, let us take part in the rehearsal with the tension and excitement of testing the results of labor, check and fill the gaps from the rehearsal, and constantly improve.
Excellent scientific composition 9 "5" is no stranger to the students, but have you found the law of multiplying any number by "5"?
I think it is easier to multiply an integer by five. But if the quantity is large, it may not be easy. Try my method-a number multiplied by 5 equals this number multiplied by 10 and divided by 2. Although it's a little troublesome, it's not easy to make mistakes, and it can also be calculated by mouth. It not only improves the accuracy, but also saves time.
This method is also good when the decimal is multiplied by 5. For example, 1, 6×5, students usually have to line up vertically, but with my method: 1, 6×10&; Leather; 2. First get 16 by decimal shift method, and then calculate 1 and 6× 5 = 8.
This method is not only useful for 5, but also can be multiplied by 50 or 500. 50 times 100 equals 2, and 500 times 1000 equals 2. ...
If multiplied by 0 or 5, it will be reduced by 2 times and multiplied by 0. 05 reduced by 20 times and so on.
Is my little trick not good?
Excellent scientific composition 10 I have loved science since I was a child, because science can achieve everything:
Science can invent "sonic running shoes". As long as you can wear these shoes, your running speed can be increased by 10,000 times. If I am at home, it only takes a few seconds to get to the park; If I am in Lhasa, it only takes a few minutes to go home.
Science can invent "fully automatic computer". This kind of computer can float in the air, which is convenient to carry around and can be touched. As long as I say QQ, all QQ numbers will appear on the computer. This kind of computer will emit air conditioning in midsummer; If it is in the middle of winter, it will emit heat energy; If it is in spring or autumn, it will give off fragrance.
Science can invent "automatic robots". This robot can cook, cook, wash clothes and so on. But its best function is cooking. The dishes it cooks are more delicious than those cooked by five-star chefs.
Science can invent "war-class sports cars". Such a sports car runs at 100 million kilometers per hour, so people don't have to be late for work. The most unexpected thing about this sports car is that it can run on the road, swim in the water and fly in the sky. It's really complete
Although these things have not been invented yet, I believe there will be a bright future!
Excellent scientific composition 1 1 "Science is all around us." This is the theme of this speech. Today, Grandpa Bai Wuming, the leader of the lecture group of old scientists and doctoral supervisor of the Graduate School of Chinese Academy of Sciences, came to our school and gave a lecture on popular science to the students in grades five and six, which benefited many students a lot.
Grandpa Bai told us a lot about astronomy and geography. Among them, what I remember vividly is the appearance of aurora: the sun will spray the solar wind and charged ions with great energy to the earth every time. The outer layer of the earth's magnetic field is called magnetosphere, which can block the charged ions of the sun. However, some fish escaped from the net and entered the earth, causing oxygen molecules and nitrogen molecules in the atmosphere to generate heat, which was finally released into the sky in the form of light.
"Science is all around us." Grandpa Bai mentioned this sentence four times in his speech. The proponent of grandpa Bai's theory of continental drift stares at the map of the world every day and observes and studies it with a map every day. Many things happen. Finally, he found that the mainland can be spliced together well. Students, be a serious and responsible person and observe everything in life, and you will become the next Wei Gena.
Growing up, there has always been a question in my heart, why do I always smile at the sun? This question can be answered by studying a hundred thousand whys. At first, the mystery that sunflowers face the sun has been solved.
It turns out that there is a hormone in the stem under the sunflower disk, which can stimulate cell growth. This hormone is called auxin. On sunny days, the auxin in the back light side is more than that in the light side, and it grows faster. In this way, the whole disk nodded to the sun and turned around it, as if it were "smiling" at the sun. It is also known that the sunflower disc is composed of100000 florets.
Through the study of "100,000 Why", I know that daffodils will grow and bloom in clear water; Plants sleep because they are too tired; Bamboo usually blooms and bears no fruit, but it can also reproduce offspring; It is best to cut bottles and arrange flowers at noon; The seabed is uneven, like land, with ridges, basins, plains and trenches. Waiting for knowledge.
By studying the scientific knowledge in books, I know more about things around me and love science more!
Excellent science composition 13 I have a good wish-; When scientists serve the people and the country.
If I become a scientist, I will develop the most advanced cloning technology and clone a large number of giant pandas, Yangtze finless porpoises and rare animals, so that the next generation can see their beautiful figures and make the world beautiful and proud of them.
If I become a scientist, I will build a moon resort on the moon, so that people who come to the moon for vacation can eat food and fruits containing space, feel the magic and beauty of space, and let people here relax and forget their troubles.
If I become a scientist, I will develop the fastest means of transportation, which can do anything from heaven to earth. Its maximum speed can reach 100 meter per second. It can take you to travel to Thailand. Very environmentally friendly and energy-saving. This is the fastest and best means of transportation.
If I become a scientist, I will control the puncture technology to achieve the fastest speed, making travel easier, more convenient and faster. As long as I enter the portal and choose where to go, I can go where I want to go at once.
I will definitely become a scientist who is useful to society, so I will study harder, enrich myself and realize my dream as soon as possible.
Excellent scientific composition 14 In a colorful world, there is a teenager who is weaving a brilliant future with colorful fantasies, and that is me-an excellent scientist in the future.
If Wu were a scientist, I would make a special kind of clothes for human beings. He is warm in winter and cool in summer, big and small. This kind of dress is just a coat. It will change its size with your figure. Its temperature will reach 20 degrees Celsius in cold weather, and it will remain between 1 1 Celsius and 18 Celsius in hot weather. This kind of clothes has the function of automatic cleaning. By the way, there is a square pocket on the clothes. Everything on the earth can be put in without a heavy burden. When you want to take something, just say to your pocket,' Come out, thing.' What you are looking for will automatically jump out.
If one day I really become a scientist, I will try my best to reform and innovate, and the home of mankind will become more and more beautiful with the efforts of me and the vast number of scientific and technological workers.
One night, when I was making honey tea in the kitchen, the lid wouldn't unscrew, so I asked my mother for advice. Who knows? My mother asked me to find out for myself. I thought about it for a long time, but there was no result. Mom, come here and let me have a good look at how she opened it.
I saw my mother come to the kitchen, first pumped some hot water, soaked the honey pot in hot water for five minutes, and then put it in the refrigerator. Five minutes later, my mother took out the honey bottle, and then the lid was easily unscrewed. My second monk, I can't figure out what my mother said: You don't understand this simple truth. After that, my mother took out my science book from her schoolbag and let me have a good look. When I saw it, it turned out to be the principle of thermal expansion and cold contraction. My mother nodded and gave me a science lesson: the canned food I bought was not easy to open because the factory was hot and the gas expanded. After cooling, the internal gas volume decreases, and the external atmospheric pressure is greater than the internal pressure. It is easy to open when it expands with heat and contracts with cold.
After that, I sincerely thank science. It helps me to make progress and grow.