Each of us has our own wishes. My wish is to be a scientific experimenter.
Being a scientist is to benefit mankind and give it a beautiful home.
I really want to be a scientist. Every time I see garbage on the roadside, I want to invent a cleaning robot. If it sees a garbage, it will run to the garbage and eat it. This can not only charge the robot, but also beautify the environment. There is an exhaust pipe similar to a car in the back. After the smell of garbage is purified, fresh air is discharged from the back. Unfortunately, I can't do this.
I really want to be a scientist. Whenever I see the river being polluted, I want to invent a robot that can make the river stink. If you see which river is polluted. He dived into the river and sucked all the smelly water into his stomach, not only cleaning the robot's stomach, but also charging the robot and even discharging fresh river water. In this way, human beings will not get many diseases because of many rivers. Unfortunately, I can't do all this.
I really want to be a scientist. Whenever I see farmers in that orchard busy harvesting, I want to invent an orchard robot. Every harvest, he will get up and put a fruit in the basket. What do you mean, there is no electricity? Nothing, if the robot has no electricity, it will pick up the rotten fruit on the ground and eat it. Eat it, and you will turn fruit into sugar and Batang into electricity. This will not only charge the robot but also avoid attracting flies. Unfortunately, I can't do this.
I really want to. .....
I will study hard now and try my best to realize my wish.
Electricity is indispensable in our daily life. We should learn the science of electricity, use electricity safely and try our best to save electricity, which is also a virtue!
We have a lot of knowledge about using electricity, so we must always keep it in mind, or we will have bad consequences and even lead to tragedy if we are not careful. I remember once, Xiaohua walked into the refrigerator with steaming mung bean syrup just made, hoping to enjoy the feeling of cold drinks. After a while, the refrigerator suddenly "had a fever", and the whole surface of the refrigerator suddenly became very hot, and then it made some buzzing sounds! At this time, Xiaohua's mother just came back. When she saw it, she seriously criticized Xiaohua. She immediately took all the mung bean candy out of the refrigerator and put it on the table. When it was cold, she put it back in the refrigerator. Why is this? After her mother's explanation, Xiaohua realized that putting hot things in the refrigerator has three hazards: first, it will increase the work of industrial refrigerators and consume more electricity; Second, it will shorten the life of the refrigerator; 3. In extreme cases, an explosion will occur.
It has also been reported in the news that some people were immediately taken to the hospital for emergency treatment because they put hot dishes in the refrigerator and exploded due to short circuit. It can be seen how important it is to learn to use electricity safely!
What is more noteworthy is that the current "low-headed family" ignores the safety of electricity and life! I remember that time Xiaohua played with his mobile phone, and it was dead. He took a charger and played while charging. Xiaohua's father immediately warned Xiaohua: "You are not allowed to play with your mobile phone like this. It's dangerous, don't you know? " How dangerous this behavior is, but people around you are always fighting for their lives!
Science shows that charging with a mobile phone will not only shorten the life of the battery, but also be an extremely dangerous behavior, and the charger or mobile phone line will explode if it is short-circuited. There is still a lot of knowledge about safe use of electricity. I hope you don't take life seriously, but take it as a warning.
The study of electricity, you, me and him, depends on everyone for happiness and safety, and saves energy, because there is a virtue called the study of electricity!
This morning, I came to the classroom early, took out my homework and did it seriously. Halfway through the writing, I saw Mr. Wang carrying a big bag of things, as if to give us a surprise, and my heart was full of doubts.
Everyone said in unison, "It's an egg." Yes, today we are going to do a little experiment. When I heard that I was going to do the experiment, the whole person was boiling, and the doubts in my heart were "lifted". The teacher went on to say, "Who can crush this egg with one hand? There are rewards for success. "
Everyone raised their hands, almost all boys. Who knows, the teacher invited a "little girl" first? Chen Si. Chen Siyong "wrapped" all the eggs by hand, and then tried hard. But look at her, it seems that there is no effort at all. The teacher cheered her on, but she couldn't break it, and then the "big guy" in our class? Wang Zhihua yard. I saw him holding an egg, vigorously. Look, his face is flushed and his hands are shaking like a generator. I can see that he has exhausted all his strength to suck milk and can't break it. Finally, he gave up. Yang, desperate, rushed to grab the eggs, booked the money and squeezed hard. The whole person looks like a bow!
Three people tried, but no one could break it. Teacher Wang asked, "Why, three people can't break it?" Everyone is talking, only Xu Yunfei raised his hand and said, "Because the egg is round, our strength is evenly distributed in every corner of the eggshell, so everyone can't break it." Everyone said yes. Teacher Wang said, "Many scientists have also applied this principle. For example, the Sydney Grand Theatre, which is built in a round shape, is both beautiful and solid ... "
In this way, a pleasant little experiment was completed. It seems that life is so wonderful!
A large number of trees will be cut down in the future, leaving only stumps. Without fresh air, the sky is always gray and the air is filled with unpleasant smells. It is even more difficult for human beings to see a lush tree or a robust bird.
One day, a bird flew from far away. When it saw a tree, it thought, I have flown for a long time, and finally there is a tree to rest for a while. It is a miracle that a bird can survive this year. Humans cut down trees, leaving us no place to live. Alas ... it shook itself and a lot of dust fell down. It unconsciously lowered its eyelids, lowered its head and fell asleep.
A man found it and shouted, "Come and see, there is a bird here!" " "Suddenly, a large group of people crowded in, scrambling to get ahead, men, women and children. Some are holding cameras, some are leaning on crutches, and some are holding handfuls of rice. The street that was just empty was suddenly crowded with people. Everyone is talking about it. Some of them took pictures with cameras and said, "I want to take such a rare thing." Some took the meal and said, "I want to raise it. What a beautiful little guy! "An old man said," Alas, a few geese used to fly from time to time in the sky, but now every bird is so rare. " "Oh, yes." Everyone discussed their mistakes and decided to improve the environment. Just then, the bird woke up and flapped its wings and flew away.
Just looking at the future lens of birds warns us that as a person, we should protect the environment and care for the earth. Start with the little things around you, improve the environment, be a civilized person, and don't let such a tragedy happen.
If I become a scientist, I will certainly invent many useful things.
When I was a child, my ideals were constantly changing. I want to be a basketball player, the Secretary-General of the United Nations and a soldier of the China People's Liberation Army ... Now, I have set my goal-to be a scientist who benefits mankind! I want to explore the mysteries of the world with other scientists!
For example; I want to invent a kind of powder of life, so that as long as the powder of life is sprinkled on anything, it will have life, so that trees and roads will have life, so that people who cut trees will not cut trees again, and those who waste on the road will not throw garbage again. So our earth will be more and more beautiful.
I also want to invent an elevator that goes straight to Mars. As long as it is completed, people will visit Mars, live on Mars and live on other planets, so that there will be fewer people on the earth and the earth will become healthy. You can also plant trees on it. ......
I also want to invent a robot, which has many functions. For example, if you press the red button, you can go home immediately. If you press the green button, you can create many trees, so our environment will become more and more beautiful. If you press the white button, you can create a lot of food, so we don't have to buy anything. And you can go home immediately by pressing the yellow button, and you don't have to wait for a long time to go home.
Ah, I also want to invent an egg. As long as you touch it, you can get 65438+ ten thousand yuan, so there will be no financial crisis. As long as it hits, it will create a lot of water, so that our country will not be short of water. As long as you touch another planet, there will be fewer people on our planet and the earth will become more and more beautiful.
Besides these useful inventions, I want to invent many, many things. .......
This morning, I ran to the school bell tower and looked at the blue sky and birds. I can't help but close my eyes and smell the fresh air. I feel very comfortable.
The clock upstairs struck hoarse once, twice and three times ... only then did I realize that I was going to be late. I suddenly opened my eyes, but the atmosphere around me changed. The sky is no longer as blue as the sea, but it is dark all around. I thought: What's the problem? What is this place? Am I still in the bell tower? Just when I was wondering, I saw the blue and green sphere. This is the space! I looked around in surprise. Saturn, Jupiter and Uranus were all around me, really. Look down, I'm wearing a spacesuit! I can't help exclaiming.
I flew around in the spaceship and only heard a whoosh. A meteorite passed by me, and its speed was as fast as that of a racing car with 100000 km/h motor. In the blink of an eye, I saw the wormhole again. It's dark all around, like a big black mirror! I can't help shivering, thinking that if I am sucked in, it will be over. The spaceship galloped freely under my control and came to Jupiter. It just got close and got goose bumps, and it passed! It's so cold that if you leave a second later, it will turn into a big ice cube. I quickly deviated from the direction, and soon, I came to Mars again. As the book says, the colors on Mars are slowly changing, which ordinary people don't know! Finally, I went to the black hole and thought about it. Suddenly, a comet flew by and crashed the spacecraft controller. The spaceship is about to fall into a black hole. I pressed the switch hard, and there were a few drops of bean-sized sweat on my forehead. I close my eyes. ...
Hey! I woke up, in front of me, it was no longer the vast space, but the teacher's stern eyes staring at me! "Gong Boyu!" Why are you asleep again! "Then I heard the whole class laughing, and I was embarrassed to laugh.
This "space trip" is simply too exciting! Even a dream makes me unforgettable.
I have made many discoveries, but I found a little scientific knowledge for the first time, that is, hot air can be turned into water when it meets cold air, and water can be turned into ice when it meets cold air. I am very excited to know the truth!
This year's winter is surprisingly cold, with an average temperature of around MINUS 20 degrees. The snow is particularly heavy. The heavy snow covered the earth with a snow-white quilt and brought joy to the children. They made a snowman and had a snowball fight in the snow, and pedestrians put on thick cotton-padded clothes because it was too cold.
Although it snows outside, it is particularly warm at home. I was looking at the snow-white scenery outside when I suddenly noticed a strange phenomenon on the window. There is a layer of water mist on the window. When I touch it with my hand, the water will flow downwards. One of my windows is not closed tightly. Observe the mist frost carefully. After a while, I found a pattern formed on the window. I feel very beautiful. Look how amazing it is!
So, I began to do experiments. I first boiled a pot of hot water and carefully put the kettle on the windowsill. Because the window leaked a little, I soon found a layer of water mist on it. I finally understand that cold air and hot air meet and become water. I don't want to mention how happy I am.
I ran outside and exhaled. If you wear glasses, there will be a layer of fog on the lens, so you can't see clearly. I stood outside for a while, my eyebrows were frosted, just like a fairy in a fairy tale. I feel very happy after knowing this scientific common sense. Determined to study harder and master more scientific knowledge in the future!
Composition 8 for the sixth grade of science is 20xx 165438+ 10/2. I invented a time machine. I have been sitting for 30 years. I walked in the dense jungle. I looked everywhere. I found that the sun had set.
The darkness of the forest obscured my view. The wind is particularly cold at night, and Gu Song rustles, which makes me shudder. Suddenly thought of the "little guy" in my arms, I quickly took off my only coat and wrapped the dinosaur eggs tightly. The time machine not far away has issued an early warning and will take off immediately after 5 minutes. But this "little guy" in my arms is about to be born. I can't help mumbling: if I don't leave, I may miss the last chance to leave, but if I leave, ...
The distant roar of Tyrannosaurus Rex seemed to smell the breath of small life, and the book said that dinosaurs were best at attacking prey at night. My heart is pulling tighter. Suddenly I saw my mother protecting me when I was a child, and then I looked at this little guy who had been with me for more than ten days. "Forget it, if it doesn't work, just wait until the next expedition comes!" I decided to protect my "new friend" with my life. Only heard a "crack", the eggshell cracked, and a palm-sized head shook it and looked at me curiously. The plate-shaped spike at the tail made me recognize it as a small stegosaurus. Just when I was pleasantly surprised, I suddenly found a heavy gasp from the depths of the jungle. When I looked up, I was staring at me with huge eyes. ...
I suddenly realized that it was Tyrannosaurus Rex. I have heard from books that Tyrannosaurus rex is best at attacking and hunting at night. I ran like crazy, and suddenly Tyrannosaurus rex caught up with me. I saw a big stone in front, and I hid behind it, but he smelled the little stegosaurus and ran away like a cheetah. I also continue to run like crazy. When Tyrannosaurus Rex was chasing, I saw the rescue team coming, and they saved me.
This is really a thrilling adventure!
Last semester, I participated in a small science production competition, and asked everyone to make a small science production.
When I got home, I thought about it and couldn't figure out what to do. Suddenly, I saw the north wind blowing outside the window, rolling up pieces of dead leaves on the ground. Looking at it, I suddenly realized and cried, "Yes, I can make a small wind-driven production!" "
So I began to get busy. I found some small pieces of wood and fixed them with screws. Made a simple car base. I found several wheels of equal size and put them on the base, and the prototype of a car came out. I thought to myself: since it is wind, what can be used to generate wind? I've racked my brains, but I just can't think of it. Just when I wanted to give up, my mind flashed: "propeller"! Isn't that how the helicopter rises? Then I can also use it to power my car. I immediately found the spare propeller on the remote control helicopter and wired it to my car. The other end of the wire is bent into a hook, and some rubber bands are tied on it, because the rubber bands can accumulate strength after turning. Turn the propeller several times by hand, and the rotation of the propeller will drive the rubber band to rotate at the same time. After releasing the hand, the rubber band will release energy, drive the propeller to rotate, and generate wind to drive the car forward. I thought about it and did it at the same time, and it was done soon. In order to test whether I succeeded, I gave it a try. I turned the propeller for more than ten turns, and as soon as I released my hand, the car whizzed away, just as fast as the wind. In order to take it to the competition, I also named it "Wind Racing".
This year is 30 13, and I have lived for another thousand years. The world has undergone earth-shaking changes.
I bought a time machine with a lot of money. I want to travel in time. But according to the law, you are only allowed to travel to the past, not to the future time and space. I started crossing because I was not skilled in driving and it was millions of years ago. All I see are mountains and trees, and volcanoes keep erupting. I have a bad feeling. I feel a lot of eyes staring at me from behind. They are discussing: "well, should this guy eat it baked or cooked?" I was frightened, so I pulled up my horsepower and drove at supersonic speed. In this way, I accidentally hit a star, making it deviate from its orbit and fly straight to the earth, which led to the extinction of dinosaurs.
I flew back to ancient times. On the plane, I casually opened the Romance of the Three Kingdoms bought for 20 yuan. Because I just smashed the window on the plane and accidentally dropped the book. Later it was discovered by a man named Zhuge Liang. He memorized the whole book, which made him a famous strategist and invincible, because he already knew everything about the future. I flew to another country and was hungry on the way. I opened the bag and saw an apple rotten inside, so I threw it down and disturbed Newton who was studying hard. The apple fell on his head, which gave him a great idea and published the theory of gravity.
I did three things wrong in this time of traveling through time and space, which is not allowed by law. The Earth Space-Time Station sued me and punished me for coming to this school in 2 1 century 20xx, expecting me to make a profound review here.
The sixth grade composition of science 1 1 talks about ideals. Some people want to be teachers, some people want to be doctors, and some people want to be game kings ... My ideal is to be a scientist.
When it comes to being a scientist, you will definitely ask me loudly with exaggerated expressions: "Can you still be a scientist with your ghost appearance?" Hum! You really look down on people-you look down on people. Although I didn't study hard before, didn't I have ideals at that time? Now that I have lofty ideals, do you think I am still the same as before? You think I won't change? Don't believe me, we'll see! I don't believe this. I can't make you sit up and take notice, because I am sunny and handsome, lively and cheerful, quick-thinking, brave and free and easy! Look at this class cadre election. Didn't I bravely speak on stage and win the election? Look at me. After I became a class cadre, I quickly entered the role and performed my duties.
Of course, I know that being a scientist is no joke. If scientists want to invent a machine, they cannot make any mistakes. If you install a wrong nail, or make a mistake in theoretical derivation, it will lead to serious consequences and even cost people their lives. Therefore, from now on, I want to get rid of my carelessness and cultivate the necessary careful and rigorous quality of scientists from an early age.
In a word, I want to be a scientist not to show off in front of others, but to make the motherland more developed in science and technology, the country stronger and the people richer, and enter the high-tech era together.
Comments: Well, the realization of the ideal needs more than rhetoric. Since students doubt you, show them your practical actions.
12 Our life is full of science, and science is everywhere. It is like a "big housekeeper" who manages our lives every day. As long as you have a pair of observant eyes, you will surely discover the mystery of science!
I remember once, by chance, I saw a very magical scientific experiment in the second classroom in Guangdong: two books of similar size crossed each other, and they must be flat and inserted as deep as possible, so that even Hercules could not open them. ...
I find it incredible. Just two books. How can you not even open Hercules?
I took out the necessary props with a grain of salt and inserted them carefully, obviously seeing that the two books were very strong. My heart is jumping like a deer, thinking: there are only two fragile books, why can't I open them? However, to my surprise, I tried my best to pull it away. "I don't believe I will be defeated by you two little things, again!" I said angrily. This time, I even tried my best to breastfeed, but I couldn't get it off.
I was so angry that I was defeated by two small things. ...
So, I found my bullish brother and told him the whole story. He shares my doubts. My brother quickly took the book and pulled it hard, but the result was still the same. I have to believe it's true.
I was puzzled, so I asked my family's "knowledge expert"-computer for advice. Later, I understood that it was the friction between each page that made the two books bite together like teeth.
Through this experiment, I understand that we should be good at observation, think hard and dare to do anything. Only in this way can we gain experience from failure and learn knowledge from success!
Today, white vinegar will hold a wedding with white soda. White vinegar is transparent and colorless, and baking soda is delicate and bright white, which complement each other. What a perfect couple!
I used to be a wedding master. "Worship heaven and earth", I poured a little vinegar into baking soda and immediately bubbled and made a "poop-poop" sound. I opened my eyes wide and didn't expect such a reaction. They are perfectly integrated and full of passion. How delightful it is!
Second, worship gaotang! I poured half a cup carefully again, for fear that if I poured too much, it would "spark". After all, they have to get to know each other and observe each other slowly, so as to strike a "spark of love"! At this time, my mother next to me, her eyes were like a magnifying glass, staring at the substances in the bottle and observing their subtle changes. Bubbles adhere to the cup wall. Bubbles emerge from the bottom drop by drop, crystal clear, more like the crystallization of their love!
At last, I poured all the remaining vinegar in one breath, and then a strange phenomenon happened. The newlyweds expanded rapidly, as violently as a volcanic eruption, and then they merged and eliminated the barriers between them. This wedding scene is like a coke with a small version of Mentos. Looking at it again, my mother was dumbfounded. I didn't expect such a reaction. I was so excited that I picked up the cup and tasted it. That's still vinegar, a little choking, mixed with a lot of salty taste. Is this the sour taste of love?
Dad also brought a box of matches. My mom and I were a little scared at first. I wonder if it will explode. I saw my father light a match and put it in the cup. A strange phenomenon happened and the fire went out! It turns out that vinegar and baking soda combine to produce carbon dioxide, which does not support combustion. I didn't understand until I listened to my father's explanation.
This scientific experiment made me gain knowledge and love science more! This is the charm and fun of scientific experiments!
After a rainstorm in the future city, the sun shines on the cities of full of green, and there is no water in the streets. Buildings, parks, squares, green trees and safflower are spotless, and the traffic on the expressway is smooth and orderly. Looking up at the sky, the sky is high and the clouds are light; Looking up, there is green everywhere; Breathing with your mouth open is refreshing. It seems that everyone lives in a "natural oxygen bar"-this is the future city of 2 1 19.
However, today, 100 years ago, when it rained heavily in this city, there was emergency water accumulation, and some places even went boating. Although the city has attached importance to greening and sanitation, there are many green landscapes and garbage bins everywhere, but garbage debris can still be seen everywhere. Moreover, the dustbin is open, always stinking, bypassed by people, and full of dust and automobile exhaust; Traffic congestion often brings inconvenience to everyone's travel and is a big pain point for everyone.
"Future New Town" not only completely changed the face of the old city, but also completely transformed it.
Walking on the street, you won't see trash cans, nor will you see sanitation workers sweeping the road every morning and evening. Using advanced vacuum cleaning technology in the street will automatically clean up the garbage on the street, and will also adsorb and purify dust and automobile exhaust; You won't see the police uncle standing at the crossroads all day directing the road. The road robot will help the police uncle solve the problem and keep the road smooth. More importantly, when it rains, you won't see the rain river in the street. Polymer permeability factor is fused to the edge of the road outside, which will quickly penetrate excess water. The street design is also different. Some streets and sidewalks are made of water with animal boats in them. You don't want to walk on land, but you can enjoy the fun on the water leisurely. Some streets are designed into various anti-seasonal wonders according to the changes of the four seasons. Some streets look like Penglai fairyland from a distance, and some …
In the future, the city will be surrounded by blue sky, green trees and clear water, and everyone will be carefree. In the future, this city will be colorful, and this is just the tip of its veil. More mysteries and miracles need to be created in the future.
The sixth grade composition of science 15 has entered 2 1 century. With the rapid development of science and technology, great changes have taken place in people's lives. Streets and alleys are full of all kinds of cars; Farmers use advanced production tools and various chemicals to make crops grow rapidly; The train in the railway station changed from the original steam engine to electricity, and now the train is much faster than the previous train; Every household has a TV, refrigerator and other electrical appliances. However, our mother earth did suffer serious damage.
About 300 million to 500 million years ago, the climate on the earth became warm and humid. At that time, there were many plants on the earth, covering most of the earth's ground, forming a big forest with many animals in it. However, nowadays, people cut down a lot of trees and use a lot of chemicals, resulting in a serious reduction of forest area, more and more desertification land and serious soil erosion; Many animals are displaced and often suffer from acid rain.
Now the industry is very developed, and many countries have various factories, such as steel mills, electric furnace factories, boiler factories, instrument factories, garages and so on. Although these factories have brought us a lot of economic benefits and convenience in life, there are huge hidden dangers behind the seemingly benefits. The exhaust gas from the factory pollutes the surrounding environment and destroys the atmosphere. It is ultraviolet rays that directly hit the earth, causing the global temperature to rise and the Antarctic iceberg to melt. If this destruction continues, Mother Earth will disappear one day, and mankind will die with it.
Although mankind has now realized the serious crisis, there are still many people who are destroying the environment. I think we should plant more trees, travel in an environmentally friendly way, such as bicycles and buses, and recycle them. I believe that in the near future, our mother earth will be more beautiful!