One day, all the students in our lucky star composition improvement class visited Tianmen Meteorological Science Museum with the cheerful and bright accompaniment of birds.
What a magnificent museum of meteorological science! The whole building has three floors, and the outer wall is made of brown tiles, which looks like a work of art from a distance.
When you enter the museum, the first thing you see is the display board covered with meteorological scientific knowledge, including code symbols and preventive knowledge of abnormal weather such as lightning, heavy snow, strong wind and fog. There are eight striking characters on the wall directly above the exhibition board: "Observing the clouds and measuring the sky, serving the society."
Then the teacher took us to the reception room. The visiting room is more than 100 square meters, and there are all kinds of meteorological instruments in it, which is dazzling.
We first visited the magnetic levitation globe. Speaking of globes, everyone must think that it is a globe supported by a base! No, no. The magnetic levitation globe I mentioned floats in the air by itself. Why? Then I'll tell you! Because there is a big semicircular magnet under the base, there are many magnets in the earth model, and there is a very thin circle in the center of the earth model. Because of the large space in this position, a large number of magnets are placed here. As long as the thin circle of the earth model is pressed into the semi-circular magnet, the globe will be suspended in the air. The reason why it can be suspended is to use the principle that magnets repel each other on the same horizontal plane.
Then, we visited three more balls. Three-ball instrument, as its name implies, is named after three balls in it, namely the earth, the moon and the sun. The three-ball instrument can still talk? It tells us that one revolution of the earth is a day and one revolution of the earth around the sun is a year. It also tells us that the moon is illuminated by the afterlight of the sun. The moon is obviously round and blocked by the earth, so sometimes the moon is eyebrow-shaped.
Next, we visited the lightning simulator and the rain gauge. ...
During my visit to Tianmen Meteorological Science Museum, I not only gained knowledge of science and geography, but also got books on science and geography from Director Cheng. This visit is really rewarding and surprising!
A week ago, Teacher Shui informed the group to bring the plants to the next class. I quickly grabbed a handful of mung beans and soaked them in a cup. But just before the "plant demonstration class", I found a tragedy-because I forgot to change the water, mung beans collectively "committed suicide", whoops ...
But I think it can be remedied, so I took out a pot of longevity flowers from the balcony and asked my father to print a copy of the information of longevity flowers for me to go to class.
Let's introduce longevity flowers to you first! Longevity flower, also known as Christmas kale, belongs to meaty, and likes warm, slightly wet and sunny environment. In class, our well-read water teacher also told me some knowledge about pest control of longevity flowers. She said that the longevity flower will grow a white bug, which will climb on the leaves and suck the plants dry. In this case, a cotton swab should be dipped in a mixture of white vinegar and water and applied to the place where there are bugs.
Li's classmates also brought a lot of meat, but everyone argued about its name. At this time, Mr. Shui took out the black technology "AR scanner" and scanned it. A line of words appeared, "Found a flower, please check it." Pay a little attention to the water teacher, and all the name information of this flower will come out. It turns out that this fleshy flowerpot is called "Orion", and the petals will turn red when the flowers grow out.
Next, Li Yuan had a whim. She wants to scan her daffodils. But she didn't bring flowers, only a printed picture of black and white daffodils. Everyone is expecting what will be scanned. After sweeping for a while, they actually said, "Garbage classification, please check." Everyone was shocked. How do flowers turn into garbage? After clicking, it is actually a pen! He also said that "pens belong to dry garbage". Some people laughed on the spot, and some people fell to the ground laughing.
This plant exhibition not only let me know a few plants I don't know, but also let me know that high technology sometimes makes mistakes and can't be completely relied on.
At the moment, the earth is basically yellow, and there can be no less green. Why? At first, people cut down forests excessively, making not only birds homeless, but also other animals homeless. It also caused disasters such as collapse, flood and debris flow. Without forests, our earth seems to have no pillars.
At present, all the shops are following our hobbies, producing too many sodas and drinks, and the coats of sodas and drinks are canned. After drinking soda, the children threw the cans on the roadside and in the park. Roads, parks and even more places have become their homes. The jar is made of aluminum, and aluminum is also harmful to human body.
Understand? Waste batteries contain too many pollutants. The pollution caused by waste batteries is very harmful. When they are mixed with ordinary garbage, they will release a lot of toxic substances, which will pollute the air once burned; It will also pollute rivers, lakes and seas; Once it enters the soil sac and water source, it will enter the human body through various foods, damaging all parts of the human body. Therefore, it belongs to hazardous waste.
In the past, lovely little fish lived in small rivers and streams, but now the factory is built by the river and discharges sewage to improve efficiency. Since then, this river has become a good place for factories to discharge sewage. The river was polluted by sewage, and the bodies of small fish floated on the water. Passers-by smelled the smell and left quickly.
Saving water means protecting our environment, that is, saving resources. We should show it with practical actions and pay attention to saving water: for example, turn off the faucet at any time after use; The water used for washing vegetables is used for watering flowers and washing mops.
Fortunately, at this moment, people have realized that the earth is polluted, and everyone is taking action. I hope those who haven't acted will bend down and pick up the paper on the ground, so that our tomorrow will be more beautiful and tidy!
Debris flow is a torrent formed by heavy rain and flood after saturated dilution of soft soil mountain containing sand and gravel, with large area, volume and flow, while landslide is a small area of diluted soil mountain. Typical debris flow consists of thick mud suspended with coarse solid debris, which is rich in silt and clay. Under the appropriate terrain conditions, a large number of water bodies soak in the solid accumulation materials in the flowing hillside or ditch bed, which reduces its stability, and the solid accumulation materials filled with water move under their own gravity, forming mudslides. Debris flow is a disastrous geological phenomenon. Debris flow often erupts suddenly, with fierce power, can carry huge stones at high speed, and is powerful and destructive. It broke out suddenly and violently, with great destructive power.
The whole process of debris flow is generally only a few hours, as short as a few minutes. Debris flow is a kind of natural disaster widely distributed in some special landform areas in the world. It is a mixed flow of soil, water and air between sediment-laden flow and landslide, which is excited by heavy rain, melting of snow and ice, and contains a lot of sediment and stones. Debris flows are mostly accompanied by floods in mountainous areas. It is different from the general flood in that the flood contains enough solid debris such as sediment and stones, the volume content of which is at least 15% and at most about 80%, so it is more destructive than the flood.
The main hazards of debris flow are destroying towns, enterprises, factories, mines and villages, causing human and animal casualties, destroying houses and other engineering facilities, and destroying crops, trees and cultivated land. In addition, mudslides sometimes block rivers, which not only hinder shipping, but also may cause floods. The factors that affect the intensity of debris flow are debris flow, velocity and discharge, among which the flow has the most important influence on the degree of debris flow disaster. In addition, various human activities have intensified the role of these factors in many aspects and promoted the formation of mudslides.
In mid-August, the summer vacation is coming to an end. Accompanied by my mother, I participated in the activity of social science popularization 1 1 and came to Suzhou Pingtan Museum in China.
The activity starts at ten o'clock in the morning. In order not to be late, we packed our simple things early and set off. Being unfamiliar with the route, we made full preparations. Along the way, my mother had a good sense of direction and asked a passer-by to go wherever she wanted.
Pingtan Museum is very big. It is located in the city center, the most prosperous place. Go out and turn right to Pingjiang Road. The whole process of the museum takes three hours to get down. In the museum, Chen Li tells the growth history of successful celebrities and Pingtan. These celebrities have successfully performed many classic stories, such as The Legend of the White Snake, The West Chamber and The Tower of Pearl. Through pingtan, we can learn about the lives and legends of our predecessors! I learned a lot that day. I come from new Suzhou. Although I was born in Suzhou, I know nothing about pingtan. Through this popular science, I really feel that the culture of Pingtan is broad and passed down from generation to generation by celebrities. Pingtan has its unique language and special musical instruments.
That day, I also went to the stage to learn some knowledge from the teacher. The first is to learn pronunciation. You can't learn this kind of thing when you first come into contact with it. The teacher taught us patiently and repeatedly. Finally the teacher praised me. I am very happy. It was awkward at first. After all, I am not one-track-minded. I followed the teacher for a few steps and felt a little like myself. At that moment, I deeply felt that it was not easy to learn art, and I really devoted myself to giving the best to the audience. As the saying goes: ten minutes on stage, ten years off stage. It's not easy for everyone to perform on stage. Their efforts are to leave the best performances to the audience and let the characteristics of Suzhou be passed on.
As a new Suzhou native, I want to learn more about Pingtan and let my relatives come to Suzhou to see it through this public welfare activity of popular science 1 1. I can also proudly tell the characteristics of Suzhou and popularize local culture.
What a beautiful day! Wan Li, clear sky, Wan Li. I went to Qinzhou Bay Square with my cousin and grandfather.
When we came to the square, we saw a group of people in the distance, so we went to join in the fun. It turns out that students from Qinzhou No.5 Middle School and Liuzhou Middle School are performing rocket launch and radio remote control.
The first is the launch performance of the model rocket. I heard the coach shout, "Five, four, three, two, one. Launch! " With a whoosh, a rocket was launched. We looked up and saw a small point in the sky opening the parachute quickly. Because the wind was strong and the rocket was light, it was blown stagger and fell with a whoosh. "Five, four, three, two, one. Launch! " With a whoosh, another rocket was launched and staggered down. "whoosh! Hey! " The other two were also successfully launched.
Next is the radio remote control car race. Just listen to the coach's command, two remote-controlled cars rushed out of the starting line and circled on the runway, to outdo each other.
The most wonderful thing is the remote control motorcycle. There is a brave knight sitting on the motorcycle. What a proud man! I didn't run two steps at first, but I started to turn in circles and soon fell down. Later, slowly, it stopped wrestling, but it still looked funny: it swung from side to side and turned several times from time to time, like a fat girl with a bucket waist. Seeing this, we couldn't help laughing.
Finally, the wonderful performance of radio-controlled aircraft. I saw the plane take off slowly, from slow to fast, and finally the plane circled high in the sky. Suddenly, the plane flew to the White Dolphin International Hotel. Oh, my God, it's going to attack the hotel! Our hearts hung up. At this time, the plane turned around and flew in other directions. The stone in my heart finally fell to the ground. Next, the plane circled at low altitude and flew around our heads, scaring everyone to bow their heads quickly.
The wonderful performance lasted for more than an hour, and the strong sunshine made the body hot, just like the impression left by the wonderful performance, it was also hot.
Unconsciously, Grandpa Dong left, and Miss Chun came to the world in colorful skirts. I followed my mother to the park to enjoy flowers. I smelled the flowers as soon as I entered the door, and I was immediately relaxed and happy.
Look! Peach blossom girl poked her head out, some with pink smiles, some hiding behind, shy; Pear trees, pear flowers, white as jade, they are so pure; Not to be outdone, Yingshanhong bloomed bright red flowers and decorated the earth with colorful flowers. These flowers exude charming fragrance, attracting a group of buzzing bees and dancing butterflies, which makes this place full of vitality.
At this time, I found clusters of chrysanthemums in the flower bed. From a distance, it looks like purple fireworks that have just been set off. A gust of wind blew, and the petals fluttered with the wind, dancing like a group of butterflies. How beautiful! I leaned over and smelled it. Hey, why can't I smell the fragrance? I asked my mother curiously, "Mom, why is Guayeju not fragrant?" Why are some flowers fragrant and some flowers not fragrant? "Mom said shyly," I don't know. Why don't we Baidu? "
I entered on Baidu: "Why are some flowers fragrant and some flowers not fragrant?" Then carefully check the explanation on Baidu, and then suddenly realize. It turns out that the fragrance of flowers comes from an oil cell in the middle of petals, which constantly secretes fragrant oil with fragrance. Because aromatic oil is volatile, it will be emitted with water when flowers bloom. There are also some flowers, although there are no oil cells, but they also smell good. It turns out that their cells contain a substance called sugar embryo. Sugar embryo itself has no fragrance, but when it is decomposed by enzymes, it can also emit fragrance. Generally speaking, white flowers and light yellow have the strongest fragrance. Oh, it turns out that fragrant flowers are colorless and colored flowers are not fragrant. This is really an interesting discovery!
From this small discovery, I know that as long as I observe carefully and study hard, I will make more interesting discoveries and understand many mysteries of nature!
Yesterday, the teacher took us to the gym to see an interesting popular science exhibition.
Walking into the gymnasium, I saw many strange sights. Hey, what's that? A faucet has been running out of water, but there is no water pipe connector. Only when I saw the introduction did I know that there was a transparent water pipe hidden in the water. Ah! It turns out that the water pipe is the water in the water supply faucet. This is the so-called "passive water".
My favorite is a mirage. I stood a meter away and looked ahead. There is a spring hanging in the air. I reached out to touch curiously, but I couldn't touch anything. That's a mirage!
I saw another big screen. There are many strange patterns on it. The most striking thing is that there are two people on a big head. It says below that this painting has nine faces. It is said that all they found were IQ 180. I am curious to see that () many teachers also come. Alas, I only found three faces. Our Chinese teacher Ma pointed to the back and soon found nine long faces. What a good teacher!
There are many interesting things. I stopped, talking and laughing all the way, watching my classmates touch the big microphone with their hands. Listen to the students playing the electronic piano "Mi Duo Mi"; Feeling the laughter of my classmates, I really gained a lot.
Reluctantly left, I think the progress of science is really fast, and it fascinates me more and more. Also let us know that some things should not be too superstitious. We should believe in science, which can lead us to explore many unknown secrets.
I think this popular science exhibition is very meaningful.
One summer vacation, I went to the Youth Activity Center to visit the Optical Science Exhibition.
As soon as I got there, I was attracted by the exhibits in front of me. The exhibits there are divided into five categories: life science, electricity, mechanics, optics and mathematics. There are 30 kinds of exhibits, and I am most interested in the optical turntable.
I thought to myself: optical turntable? What is the optical method? I looked up, ah, there was an explanation, which made me confused. I looked at the turntable carefully. There are three colors in the turntable: yellow, blue and red, just like a kaleidoscope. I pressed the start button of the first turntable as instructed, and then the turntable turned. As soon as I turned around, the turntable, which was originally composed of blue, yellow and red, slowly turned brown. I thought: this is really fun, but why do three colors become one color? I pressed a button next to it. The turntable, which was originally composed of green and yellow, suddenly turned into emerald green. I finally understood the principle of the optical turntable: the original image disappeared, but the image did not disappear in the brain. This phenomenon is called "visual persistence".
Further, I saw three mirrors, one is an ordinary mirror, and the other two are slightly different. There is a kitten toy in one mirror and a pig toy in the other mirror. I wonder in my heart: What's the use of three mirrors in the popular science exhibition? I was wondering when my eyes suddenly lit up. There is a button next to the mirror. Unable to resist the temptation of curiosity, I pressed it with my hand. Unexpectedly, a lantern gallery appeared, just like a long road with colorful lanterns hanging next to it. If you turn off the button, the lantern gallery will disappear. I feel very strange: why is there a lantern gallery in the mirror? And why are the pictures in the mirror so long? It turns out that when mirrors can reflect light back and forth between their reflecting surfaces, they will produce images farther than this.
After visiting the optical science exhibition, I realized that there was still so much knowledge waiting for us to explore and so much to explore. I must study hard and invent more meaningful things!
At the beginning of popular science composition 10, I saw that people around me were using this network tool, but I didn't know what WeChat was. So by chance, I also applied for an account, and gradually understood the reasons for the popularity of WeChat. As a result, I seem to like using WeChat! Because it has many functions, for example, we can know the recent situation of our friends, send them the best wishes on their birthdays, give a praise and approval under other people's articles, or play a poke game with our good friends to connect our feelings. All aspects are very convenient apps.
Many times, when I don't know how to express a thousand words in my heart, I will share my feelings with you through WeChat. And I like it very much that someone can give me a compliment after sending an article, because this little compliment can often make me feel affirmed and have a good mood of happiness! So I often give others a compliment, so that everyone has the same pleasure and feeling as me! Usually, I will not only publish my own articles, but also browse the recent situation of my friends to find out how they are doing recently, or whether they are happy! And when they are depressed, give a simple greeting! Last time I found a good friend I haven't seen for years through WeChat!
But because of the convenience of WeChat, it also caused a lot of trouble. For example, we often use the sharing function to let our friends know where we have been, but like bad guys, we accidentally reveal our whereabouts bit by bit; Or is your privacy seen by everyone without your knowledge? There are even people who can't live without mobile phones because they are addicted to various games and functions in WeChat!
Wechat, which is deeply loved by everyone, has both good and bad. We must be able to judge his right and wrong, good and evil, so as not to accidentally affect our personal safety or our privacy!
Popular science composition 1 1 Youth popular science base is located in Chengdong Primary School. Covering an area of 1000 square meters, it consists of four parts: theme wall, basic research target, science museum and science corridor.
As soon as I entered the base, a huge stone in Taihu Lake came into view. It is engraved with ten powerful words "building a new road to promote learning and educate future generations". These words are all as big as my palm. Through the introduction of the commentator, I know that this is the inscription of Grandpa Sun Wensheng, the former Minister of Land and Resources. I am proud to look at these characters.
With the introduction of the explanation, we came to the bedrock reference point. Under an exquisite hexagonal pavilion, there is a glass cabinet. Through the cupboard, you can see a stainless steel pipe going deep into the ground. Through the analysis of the commentator, I learned that this is used to measure the land subsidence in Jiangsu. At this time, I have a question, what harm does land subsidence do to us? I took this question to the Science Museum. The ground subsidence model of the Science Museum and the foam model of the whole city float on the water. After listening to the commentator's introduction, the water supply was greater than the water consumption, and the ground did not sink. However, with the continuous drainage of the drainage pipe, the ground of the original city model slowly sinks and suddenly cracks a big hole. I was startled. Teacher Tang said, "There are many factories in Jiangsu. A large amount of groundwater is exploited, which leads to ground subsidence. If over-exploited, the ground will crack like a model. I finally understand the harm of land subsidence to us. I hope that the factory will not over-exploit groundwater, and we humans save water. "
When we walked out of the Science Museum, we saw three tall camphor trees "standing" beside us. A fresh fragrance suddenly appeared in front of our eyes.
Students must have discovered some secrets in their lives, but did you finally discover them? To tell you, I not only discovered the secret this time, but also proved my discovery with experiments.
There are many mice in my house. They are always crawling around in the accumulated grain and cotton, especially at night, they will steal food and bite people. Our family has taken various measures, but the effect is not great. It's a headache for this, but it's puzzling that the mouse's eyes are so small that it can accurately judge the direction and objects without seeing its fingers at night. Does it have a special function? In order to solve the mystery in my heart, I catch a few mice every day to observe and find that their eyes are all beards.
I covered the eyes of a mouse I caught with tape and let it go.
I saw that it quickly got into the mouse hole under the bed along the wall, and the first experiment failed. But I have come to the conclusion that mice don't know their way by their eyes. So what do they rely on to distinguish directions and objects? I'm confused. "Brother, brother, help me catch bats." My brother shouted and pulled me. Wake up the dreamer in one sentence, will mice rely on ultrasound like bats? I immediately took out two mice, sealed one's mouth, sealed the other's ears and nostrils, and finally got away. I was surprised that the last mouse I caught also cocked its beard and stared at me, as if laughing at me. I was very angry. Do mice know their way by their beards? I had an epiphany in my head. So I took out the last mouse, severely cut off its beard, covered its ears, nose and mouth, and then let it go. Sure enough, as I expected, I saw this mouse, regardless of east, west, north and south, stumbling left and right, completely without the air just now. "It turns out that the mouse's eyes are beards." I jumped for joy.
To prove my conclusion again, I caught several mice, cut off their beards, and then released them in the daytime and at night respectively. As a result, they hit a big cat during the day and couldn't find their way home at night.
From this, I realize a truth: as long as you observe carefully and keep exploring, you will definitely uncover all kinds of mysteries in life.
Popular Science Composition13 On the afternoon of April 22nd, the school organized all fifth-grade teachers and students to visit the 2008 Youth Popular Science Base to learn about minerals, fossils and popular science knowledge.
When we walked into the popular science base, a huge stone came into view. I looked at this "behemoth" and wrote ten red words on it: * * Build a new road and educate future generations with popular science. These words are bigger than my palm. It is said that this inscription was written by Sun Wensheng, former Minister of Land and Resources, when he visited the popular science base of our school. I am very proud of this.
Passing the gate of the popular science base, I saw a hexagonal pavilion, which looked like an umbrella and was turquoise. There are four crimson pillars below. The pavilion is a bedrock marker with some turbid yellow liquid in it. I scratched my head, not knowing what was inside. When I can't cope with disasters occasionally, the commentator solved this problem for me. "This is a stainless steel pole, which goes deep underground 182.54 meters. It measures groundwater. Because people exploit a lot of groundwater, the ground will collapse ... "I was suddenly enlightened, but at this time I was very sad. If we are not greedy, the earth will not be harmed, so we should save water and not exploit groundwater.
Walking to the south of the Science Museum, there are countless kinds of minerals, fossils and exhibition boards. There are crystal clear amethyst caves, luminous fluorite and dinosaur eggs with a long history ... The most attractive one is dinosaur eggs, which are about the size of a cantaloupe. Judging from the ownership of dinosaur encyclopedia, this and the small dinosaur egg should belong to herbivorous dinosaurs. There is a lot of red soil on the surface of this paper. It can be inferred that it was once buried deep underground, but the egg was not crushed. It's unbelievable!
Visiting the popular science base for teenagers gained a lot, and I learned about the evolution of the earth, the bedrock markers of Malaysia Airlines, and various minerals and fossils. Today, I not only increased my knowledge, but also opened my eyes!
When the bell rang, the teacher came into the classroom. The teacher stood on the platform and said to us, "There is no class in our class. The school organizes students to visit the "Popular Science Caravan". It's on the playground. You line up, be quiet and hurry up! " As soon as the teacher's voice fell, the atmosphere in the class cheered at once. We lined up quickly and walked to the playground.
I saw a bus parked on the playground with five big characters written on it: popular science caravan. The electrical appliances in the car have been moved down and placed neatly on the playground. The students ran excitedly and fiddled with the scientific equipment curiously. I also shuttle between various instruments with people, including interesting toys about mathematics, experimental instruments about physics, and …
My eyes were attracted by an interesting math toy. Let's build a pyramid top with balls glued into various shapes. I swung from side to side, but I couldn't stand up. In the meantime, several students tried, but all ended in failure. I was deeply fascinated by this physics olympiad problem, and developed a persistence of never giving up until I succeed, and attacked this "difficult problem" again and again.
Time passed unconsciously, and I ruled out one overlapping scheme after another. What should I do? My brain cells are spinning fast. After listening to the teacher's instructions, I suddenly realized: this way, this way, this way again ... Well, you're done. Looking at the neat pyramid in front of me, the joy of success arises spontaneously, and I can't wait to tell the world. Of course, I can't and won't do that. People are always modest.
Soon, after class was over, I reluctantly walked back to the classroom. This short forty minutes left a deep impression on me. Schools should hold more such activities, entertaining and entertaining, so that students can expand their knowledge in the game. Why not?
Happy forty minutes passed, and then a busy day. Adjust your mood and concentrate on your studies!
I study in a beautiful campus where there are trees and flowers everywhere. As soon as I walked into the campus, it was like walking into the garden. I not only smelled the rich fragrance of flowers, but also filled with the rich fragrance of books, which made me feel relaxed and happy. No wonder Xincheng Primary School was rated as a green school by Dongguan! Among them, my favorite is the popular science botanical garden on campus.
From a distance, two tall bonsai placed at the door were rolled into different patterns and stood upright there. Whether it is windy, rainy or hot, they guard the entrance of the botanical garden like loyal guards.
In the morning, I gently opened the door and walked into the popular science botanical garden. I was greeted by a fragrance, which I enjoyed smelling. The smell of roses makes me very comfortable. It turns out that there are rows of colorful roses on the roadside, including red, pink, white and yellow ... they compete with each other. Little bees can't help but join in the fun, and they are busy collecting honey freely among the flowers. Looking at the whole botanical garden, it is covered with moss, just like a big green carpet.
A red arch bridge spans a pond. I walked to the bridge. On the bridge, I saw many small bubbles spit out in the pond. I guess the fish in the pond must be having a party. There are many lotus flowers planted by the pond. As you can imagine from the withered lotus stems, if summer comes, the pond will be beautiful.
Walking on the cement road, there are trees and fruit trees along the road, including loquat trees, ginseng fruits, pine trees and plumeria ... everywhere is green, and the green leaves are stacked one after another without leaving a gap, exuding endless vitality.
How beautiful the botanical garden is! It really makes me linger!