Sixth grade scientific composition 1 In a colorful world, there is a teenager full of colorful fantasies, weaving a brilliant future … that is me, an excellent scientist in the future.
I become a scientist, and I want to design a multifunctional tableware. This kind of tableware is developed from the discarded things in people's daily life. This kind of tableware that can be used in families and hotels is inexpensive, economical and practical. When you finish your meal, this unique tableware will slowly melt, turn into colorless and odorless gas and disappear into the vast atmosphere. It not only contains no toxin, but also helps to purify the air in nature. In this way, the problem of environmental pollution caused by a large amount of garbage produced in people's diet is solved.
In order to make crops, fruits and vegetables grow with sufficient fertility, I will also develop a new type of oxygen-making machinery. This machine can collect carbon dioxide, nitrogen and other substances in the atmosphere and make them into nutrients for plant growth. Using this machine can not only alleviate the greenhouse effect caused by excessive carbon dioxide, but also make fruits and vegetables more nutritious and delicious.
I really became a scientist. I want to invent an instrument to solve noise pollution. This instrument is about the size of a matchbox, and it can absorb and digest the noise coming from all directions, thus making people's living environment cleaner and more beautiful, and people will no longer be difficult to sleep and restless because of noise.
I have really become a scientist, and I will do my best to reform and innovate. The home of mankind will become more and more beautiful with the efforts of me and the vast number of scientific and technological workers.
On Saturday afternoon, I had nothing to do at home, so I lay on the sofa and watched the scientific experiment on TV. I was very curious and decided to do this experiment.
Just do it! I found a bottle of red ink, a piece of blue ink and a few white flowers, and prepared to do the experiment.
According to the steps on TV, I first poured red ink and blue ink into two thirds of a plastic cup, and then put white flowers into these two cups respectively. Then I moved a chair and sat on it and waited.
10 minutes passed ... 20 minutes passed ... 25 minutes passed, and the flowers still didn't turn red (blue). What happened? The white flowers haven't changed color yet. It can't be a lie on TV! I thought indignantly. Well, let's go out and play. It's boring to stay at home anyway.
So, I played outside for nearly an hour and then came back for a drink. Suddenly, I found that the two white flowers in the plastic cup turned red and blue respectively. What happened? Is the flower withered? No, it's impossible! A big question mark popped up in my mind.
After thinking for a long time, I suddenly remembered that I had read a book, which mainly said that plants have stomata and lenticels on their leaves and petals, and plants need to absorb water. Ah! Could it be ...
Sure enough, the answer is exactly as I expected. It turns out that there are pores and lenticels on the petals of flowers, and their function is to transpiration water. If the petals keep transpiration, the stem will keep absorbing water. When the flowers are inserted into the red ink bottle (blue ink), the stem absorbs the red ink (blue ink), and the petals can turn red (blue) by transpiration.
Life is full of science, students. From today on, let's study hard, and discover the unknown in the known science and the known truth in the unknown science!
I have an ideal that is easy to say, but complicated and difficult to realize, that is, to be a scientist. It has changed and shaken, but I still firmly hold it in my heart.
When I first learned to read, this idea came into my mind. Sitting in the courtyard, I saw the rain dripping along the eaves and gradually disappearing into the ground, so I began to think about why this happened. I didn't tell my family and friends, but chose a person to draw this picture on paper and stare at the stick figure whenever I have time. Later, I saw more and more things and accumulated more problems.
Problems should always be studied slowly. Every time I see some phenomena, as long as I can't tell the reasons immediately, I will record them in a notebook and try to understand them as much as possible. Some questions that others think are very naive will become part of my problem notes. But I also have self-knowledge, and what I am doing now can only be regarded as a stepping stone on the ideal road. For the future, I also have a plan to grasp all the knowledge and keep it in my mind; Go out and have a look, after all, seeing is believing; Try to find like-minded friends and accomplish distant dreams together. And this will be a step on my road as a scientist.
I have always thought that a life without an ideal is like wandering endlessly in a maze. And for the sake of ideals, the time that has passed away is of great value.
My ideal is to be a scientist and invent many good things. Because scientists can always invent many good and strange things, I especially want to invent some. But I am so young, I will invent it when I grow up. But when I was a child, I would slowly cultivate my spirit of continuous exploration.
In fact, I still have many, many, many ideals. For example, painters, musicians, calligraphers and so on. But I can only do one task, because I don't have that much time, so I can only be a scientist.
When I become a scientist, I will invent a time machine first. This time machine can let you enter the human body, but you should be careful when you enter other people's eyes. You'd better go in from the corner of your eye, otherwise it's not good to blind your eyes. You can also enter all parts of the world through the time machine, and you can go anywhere in just one minute.
I'm going to invent a laser gun, and I can't run out of bullets. If you meet the enemy, as long as you shoot, the enemy will immediately destroy the light.
I also want to invent my own world, where the trees are very green. In winter, the grass is also green. There is still a lot of water there. Because there is very little water on the earth, I must transport some water from my world to our earth.
I want to keep some Yangtze cakes as my pets. But Yangzi Hua likes meat very much. What should we do? Because I'm a scientist, I invented some pills, which will be eaten by Yangtse, and it will become a vegetarian. I also want to build countless ponds and keep my pets in them. I have other good things besides Yangtze cake there! For example, reindeer, tigers and leopards, dinosaurs and so on. Dinosaurs are my favorite, such as Tyrannosaurus Rex, Liang Long and Stegosaurus ... Because this world belongs to me, I like it very much. Of course, I also welcome my friends to play in my world. Will you come?
My ideal is to be a scientist when I grow up and invent many advanced scientific instruments to make people's lives better.
If I were a scientist, I would invent a smoking cessation device to make my father and all smokers quit smoking. At that time, our city will become a smoke-free city, and every family will be a smoke-free family, so that the harm of smoke will be far away from our relatives and our city will not be eroded by white smoke again.
If I were a scientist, I would invent a traffic robot, so that when there is a car accident on the traffic road, someone can arrive at a fast speed to minimize the damage caused by the car accident. With the traffic robot, the traffic police uncle is no longer so hard. Just let the traffic robot stand on the traffic platform and you can see around and listen to all directions. If I were a scientist, I would invent a kind of candy, which is specially invented for children, so that those who love candy will not be afraid that their teeth will be eaten by moths after eating it, and the IQ of children will rise, and children will not get fat after eating it. Mix vegetables into candy, so that children can not only form the habit of loving vegetables, but also eat a lot of candy. This is the best news for children.
I want to be a scientist, I want to benefit mankind, I want to realize inventions that scientists can't make now, I want China students to say "I'm from China" with great face when they are in other countries, and I want to invent many great things, so that foreign scientists can sit up and take notice of us in China and all foreigners have to admire us in China.
I want to invent something that can purify the air and protect the environment, and wipe out all the rubbish in the world from the earth, so that we can see the bluer sky, the brighter sun, the brighter flowers than the greener grass and let people absorb the fresher air.
I want to be a great scientist. I want to invent many great things to benefit mankind and make great contributions to the development of mankind.
Science is familiar to us, but "unfamiliar". There are many interesting sciences hidden in our life, but it is hidden around us.
As you may know, generally in winter, we all wear dark clothes; However, in summer, people usually only wear light-colored clothes. It is always said that clothes are thick in winter, which is inconvenient to wash, and dark clothes are resistant to dirt; Change clothes more frequently in summer. Wearing light clothes looks better and is easy to wash. However, these are only secondary, and there is another most important reason-the absorption and reflection of sunlight by color.
Under the same conditions, the same substance, if the colors are different, will have different conditions in terms of temperature and heat release when it receives thermal radiation. Dark colors will absorb many light sources, which will generate a lot of heat energy; Light color, on the other hand, absorbs some light sources, while white reflects light sources. So under the same light source, it will be cooler to wear light clothes, but it will be hotter to wear dark clothes.
Although we have solved the problem of "why do people like to wear dark clothes in winter and light clothes in summer", why can white reflect the light source?
The sunlight we can see with the naked eye consists of seven different colors of light, such as red, orange, yellow, green, cyan, blue and purple. And one color can only reflect its true color and only absorb other colors. And white can reflect all colors of light, so it appears white; Black, on the other hand, can absorb any color, so it appears black.
Wow! It turns out that there is such a big scientific secret hidden in our life, but there are still more sciences hidden in our life waiting for us to explore. Come on! It is not the lack of beauty in the world, but the lack of eyes to find beauty!
I couldn't help sighing when I looked at the sky, thinking to myself: The weather was fine just now, it didn't rain early, it didn't rain at night, and it began to rain as soon as I was going out. When I was worried, my mother asked me to drink Lycium barbarum tea. As soon as I saw Lycium barbarum tea, I immediately became interested in it. Because I saw a lot of Lycium barbarum floating on the top of the teacup and a few Lycium barbarum at the bottom of the teacup, I felt particularly strange. Why do some Chinese wolfberry float on the water and some Chinese wolfberry sink under the teacup? I thought about it carefully: maybe Lycium barbarum is like a ball, and there is air in it to float on the water.
I started doing small experiments. First of all, I took out two pieces of Lycium barbarum floating on the water, put one of them in the water and flattened it with a pair of chopsticks. As I expected, Lycium barbarum really bubbled up in the water. Then I took off my chopsticks to see if the wolfberry fruit would sink, and I saw that the wolfberry fruit slowly sank. Then I put another medlar on the bottom of the teacup with chopsticks, and took off the chopsticks. This medlar slowly floated up and finally floated to the water. Well, I finally figured it out. It turns out that my guess is right. Because the air in the first medlar came out, it sank. And there was air in the second medlar, so it floated up.
Through this small experiment, I learned a truth. Lycium barbarum is like a ball. With air in it, it can float on the water, but without air, it will sink. composition
I am very happy today, because my mother bought a set of Newton's experiments for me from the Internet. My mother told me that this set of experimental supplies tells a lot of scientific truth, and the key is that I can operate it with my hands.
Opening the small box, my eyes are blurred. There are all kinds of experiments in it, including scales, portable electric fans and balloon helicopters. Among them, my favorite is the balloon helicopter, which is composed of propeller, interface, balloon and air nozzle. Looking at these experiments, I can't wait to assemble the helicopter.
First of all, I connected the propeller with the interface, and put the balloon on the nozzle. Then I blew it up and sealed it with my hands. I found that I should not let the air flow out at this time. I held the balloon with my hands to connect the nozzle with the interface. "Okay, Mom, do you want to watch the show?" I shouted loudly, and when my hand was released, the balloon helicopter quickly flew to the sky with wonderful music. I cheered and jumped for joy. It was fun! "Do you know why it flew into the sky?" Mom asked with a smile.
I didn't make it clear for a long time. My mother picked up the balloon helicopter and said, "The jet plane uses the aerodynamic principle, uses the contraction force of the balloon to trigger air flow, and makes the propeller rotate to generate power, thus driving the whole toy to fly in a balanced way, and at the same time, some air flows to the sound device, which will also make sound." Listening to my mother's detailed introduction, I nodded puzzled, and then carefully observed each group, and found that there were pores in it, no wonder there were voices coming out. Look, playing with experiments not only cultivates interest, but also gains a lot of knowledge in playing!
I really like this set of scientific experiments. Do you want to play? Buy one as soon as possible!