Last week, my mother bought me a book called Encyclopedia of Juvenile Science. In the evening, we couldn't wait to choose two experiments from them.
The first experiment is a magnifying glass. We first poke a round hole in the middle with a piece of cardboard and scissors, then tear a piece of transparent glue and stick it on the round hole, put a straw in the water bottle to suck some water, and then drop a drop of water from the straw on the transparent glue, and the magnifying glass is ready. We tried it and it really zoomed in. We use it to read the small words on the medicine box, and the words become very big and clear. Dad said that this is the wish of air refraction, and the haha mirror in Children's Palace is also based on this principle.
The second experiment is to make a spinning snake. Draw a spiral shape with a square piece of paper, then cut it along the line with scissors, paint it with bright colors, and put it on its head. When I finished, I lit a candle at the bottom and it began to spin slightly. Because I made the snake too long to spin, I cut it short and put it on the candle. The rotation was a little better, and I felt a little angry, so I cut it short and put it on the stove, and began to spin wildly. Dad said that the scientific reason for this experiment is the rising of hot air.
This book is so interesting that my mother promised to accompany me to do an experiment every night.
On Sunday, I was reading a science book. Suddenly, I was fascinated by a scientific experiment. Draw a hole with the size of fifty cents on the paper, and a one-dollar coin can pass through it. How is that possible? A dollar coin is smaller than a dime and will not pass, but can it be proved by experiments?
The experiment began. First, I prepared a one-dollar coin and a fifty-cent coin. I first drew a hole the size of a dime on the paper. Next, I am confused. How can I let the coins pass? Straight through? Give it a try! As a result, the paper broke and the first experiment failed. But nothing is difficult in the world. As long as you are willing to climb, nothing in the world can be successful at once! I decided to do it again.
The second experiment began. This time, I think it over. Suddenly, I had a brainwave. I found that the paper was squeezed into the middle and formed an oval shape. So that coins can pass through? My experiment was really like this, and it finally succeeded!
Through this experiment, I know that everything can't be easily believed and needs to be proved by experiments, so I can't draw a conclusion easily. We should constantly seek the unknown in the known to get more things.
On Sunday, I was reading a science book. Suddenly, I was fascinated by a scientific experiment. Draw a hole with the size of fifty cents on the paper, and a one-dollar coin can pass through it. How is that possible? A dollar coin is smaller than a dime and will not pass, but can it be proved by experiments?
The experiment began. First, I prepared a one-dollar coin and a fifty-cent coin. I first drew a hole the size of a dime on the paper. Next, I am confused. How can I let the coins pass? Straight through? Give it a try! As a result, the paper broke and the first experiment failed. But nothing is difficult in the world. As long as you are willing to climb, nothing in the world can be successful at once! I decided to do it again.
The second experiment began. This time, I think it over. Suddenly, I had a brainwave. I found that the paper was squeezed into the middle and formed an oval shape. So that coins can pass through? My experiment is really like this, and I finally succeeded!
Through this experiment, I know that everything can't be easily believed and needs to be proved by experiments, so I can't draw a conclusion easily. We should constantly seek the unknown in the known to get more things.
Everyone has his own ideal, some want to be a doctor, some want to be a teacher … and my ideal is to be a scientist and make the world a better place.
If I were a scientist, I would invent a universal pill that can cure any disease. This will make the elderly healthier, adults stronger and children more lively and lovely.
If I were a scientist, I would invent a solar car, which can run normally at any time. As long as there is a ray of sunshine, it will absorb sunlight and convert it into energy. Shh ... Let me tell you a little secret. It can also absorb carbon dioxide and release oxygen! How's it going? Isn't it amazing?
If I were a scientist, I would invent a garbage collector. This garbage cleaner is not an ordinary garbage cleaner. It can turn useless things into useful things. Very convenient.
I really want to be a scientist, but there is still a long way to go. What we can do now is to study hard and make this ideal come true.
One day, my father brought me some mantis eggs from the ground. I asked my father curiously, "Dad, when did this egg hatch into a little mantis?" Dad said, "The little mantis will hatch next summer." I thought to myself: Do we have to wait so long? Why can't we hatch in winter and wait until summer? What can we do to make it come out in winter?
With questions, I went to check the relevant information and learned that anti-season cultivation must break dormancy, simulate temperature and humidity, adjust the environment and artificially create natural conditions. So I prepared two mantis eggs, one in the kitchen, the temperature is about 10, and the other is to find a transparent glass bottle, put a little water in it, put mantis eggs and branches in it, and then put it in a strong light and high temperature place, the temperature is about 22℃. To be on the safe side, I put a thermometer to adjust the temperature and humidity.
After a series of work, I watch it every day. I look forward to the birth of little mantis every day. A week later, nothing changed. I'm a little depressed. After another two weeks, something finally changed. The color of the eggshell has changed a little. The mantis egg swelled, and I was ecstatic. I waited patiently for a few more days. Finally, one morning, I found many little mantises in the bottle, some crawling on the window, some crawling around the window sill like headless flies, all over the window sill, but the kitchen didn't change at all. This proves that incubation time is directly related to temperature. So I thought, if the temperature is higher, can you shorten the incubation time?
With this question, I'm going to do the next experiment. I went to the wild to collect a mantis egg, hatched at about 30 degrees, recorded the time and waited patiently for observation. As a result, the time was really advanced, and I was very happy, because it proved my idea.
In order to get a more accurate conclusion, I collected a lot of data. Finally, I proved that mantis can hatch in winter, and it can be cultivated out of season as long as reasonable conditions are met, and the incubation time will be shortened with the increase of temperature.
Out-of-season farming is not conducive to the growth of mantis, because of the lack of food sources, mantis will die in large numbers and it is extremely difficult to survive. Therefore, anti-season planting is not recommended.
Love animals and protect nature, you and I work together!
In science class, the teacher gave us an interesting experiment, and I want to practice it myself. I couldn't wait to prepare the experimental materials as soon as I got home.
I went into the kitchen, opened the cupboard, first took out white vinegar and baking soda, and then took out the detergent from the cupboard and put it on the table. Finally, I took out a small glass and a stick. In order to see more clearly and make white vinegar more beautiful, I brought a pen with blue ink.
All the tools were ready and I started the experiment. I chose a glass from the materials and took out a white vinegar bottle. This bottle of white vinegar is still new, with packaging. I carefully cut a small hole in the plastic tightly wrapped around the bottle mouth. With this breakthrough, the package was torn in half. Exposing the bottle cap, I opened it and poured white vinegar into the cup. After half a cup, I stopped pouring and began to drip ink. As soon as I took out my pen, I smelled a smell of white vinegar, which was particularly pungent, like the north wind in winter. Cold and sour, several times more than citric acid. Although lemon will make your teeth sour, it has a fruity smell. And white vinegar, not only does not have the fragrance of fruit, but also mixed with the spicy taste of alcohol, which makes me blind. I thought to myself, "White vinegar is so sour and smelly. It is not easy to do an experiment. " My heart beat a retreat. However, an example of a scientist who tried a thousand times and finally succeeded came to my mind, and my mind was revived.
I cleaned the nib and put it on the rim of the cup. Holding my breath, I slowly squeezed the ink sac down with my hands and squeezed out five drops of blue ink. Five drops of ink drop by drop, sink into the bottom of the cup, quietly, like a blue coral reef. I accidentally touched the cup with my hand and it moved forward a little. The coral reef moved, swayed with the shaking of the water, swayed upward, and "diffused" and gradually dissolved into the water. The water turns blue, like the light blue when the sea meets the sky, with silk in the blue.
I squeezed a few drops of scented detergent and bounced off the bottle like a naughty elf, with a faint lemon smell all the way. A burst of sweetness suddenly filled the cup, covering up the sour white vinegar and forming a clear film at the junction of vinegar and air. I use a small stick to stir clockwise, and the sound of "Ding Dong" is endless. In a short time, vinegar was covered with foam, and hundreds of small bubbles were colorful and thick like a layer of broken glass slag under the sunlight, like pearls. You can see yourself through the glass. I thought with satisfaction: it should be good to stir it like this.
Then came the most important step-adding baking soda. I put Xiao Su in the spoon in my bag. Baking soda is white, as white as snow. When I am ready, I slowly lift the spoon and hang it at the mouth of the cup. Suddenly, a little baking soda fell into the cup, into the vinegar, making a "zi zi" sound, accompanied by some small bubbles. Then, I poured baking soda into it at once, and there was a "rushing" sound. Caked baking soda fell into the sea of vinegar like a huge iceberg and was swallowed up at the fastest speed. It took only two seconds to reach the bottom of the cup. Soon surrounded by baking soda insoluble in vinegar, the whole iceberg was swallowed up, and the subsequent bubbles rose rapidly like a volcanic eruption, like a fountain spewing spring water, from the original half cup to half cup. "Not enough, not enough!" I poured some more baking soda. This time, baking soda made a big hole in the foam like a waterfall and went straight to white vinegar. I put the stick in and stirred it. Now, like a hornet's nest, the bubble is soaring. I was too surprised to blink for fear of missing something. Through the glass wall, I saw the baking soda deposited at the bottom of the cup melting and bubbling, and the foam had rushed out of the bottle mouth against the foam, which was unstoppable. I am quick-sighted and quick-footed, so I took out a basin and put the cup in it. This dreamy blue foam floated into the basin like fog for a long time, squeezing the stick in the middle. After the "volcanic eruption", the foam receded a few minutes later, and the peace before the experiment was restored. This spectacular sight made people very shocked and happy at the same time-the experiment was successful and it took me a long time to calm down.
What is the secret of "volcanic eruption"? I decided to ask a secret: white vinegar reacts with baking soda to produce carbon dioxide. Although the thermal effect of this reaction itself is almost zero, carbon dioxide increases the surface area of water, makes it evaporate faster and cools it down. Little Suda is sodium bicarbonate. When mixed with vinegar, it will react violently and produce a lot of carbon dioxide. I suddenly realized, picked up a pen and paper and began to record the experiment.
This experiment not only enriches our scientific knowledge, but also makes us understand that as long as we have a pair of eyes that are good at discovering and a heart that dares to explore, we can discover the science in life.
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!
Now it is 20xx, and there are countless high-tech products and high-tech houses, including glass houses, snow houses, underwater houses, boat houses, forest buildings and barrel houses.
I have a particularly domineering house, which is unique on the earth. Its walls are bulletproof, and so is its glass. Whether it is a bullet or a wall-penetrating bullet, as long as it touches the wall of my house, it will be tackled immediately, and the safety factor has increased a lot. The most interesting thing is that there are several lines of defense in front of my house. The first line is the cornea, which is used to wash the eyes. The second line is to unlock the fingerprint. The third line is to brush your face. The fourth line is verification. Haha, that sounds troublesome. It is not troublesome to use, and the whole process will not exceed five seconds. If it judges that you are family, it will open the door immediately, otherwise it will be locked, with a general error rate of 0.2%.
The first thing you see when you enter the door is a piece of glass, not ordinary glass. This is a telephone glass invented by a scientist. If you stand in front of the glass for more than three seconds, the glass will make a sound and ask who you are looking for. As long as you call once, he won't forget, and there is no such thing as downtime. As long as you name it, even in the Pacific, he can help you find this person. Then I will see a TV, not an ordinary TV. It is connected with other electrical appliances and can prevent theft. If a thief touches the appliances, every appliance will sound an alarm. And it will emit light that can hurt people and beat the thief away.
Let's introduce here first.
The so-called "makers" are those who boldly conceive, dare to innovate and are not afraid of authority. They don't always follow the rules, but dare to overthrow the routine life, like invention and creation, and are not afraid of fallacies. And our writing innovation interest class is just for these students who love invention and creation.
In my opinion, the real maker doesn't just stay in the lab all day and make a knowledgeable appearance, but can study some seemingly insignificant small problems in a monotonous life, so as to find the fun and sense of accomplishment of innovation. Innovation is not just a slogan, but a product of bold ideas and personal practice again and again. So, in fact, there are many makers around us!
Water Cut, Exploring the Secrets of Seed Growth, Steaming Ice ... In my spare time, I always do some small scientific experiments like this, and sometimes I write down my experimental steps and some feelings afterwards. I feel that I am not only doing experiments, but also being in close contact with nature and exploring the mysteries of science and innovation in the vast universe.
"Too superficial, I don't know anything." Of course, as a qualified maker, it is not enough to know a little written theoretical knowledge. You must create it yourself, so that you can understand the principles and mysteries. Last weekend, my classmates and I jointly designed a portable strong light small desk lamp. Although our knowledge is limited, its circuit is broken and it is easy to leak electricity, but this small desk lamp is the first product we designed together, and its significance is not light to us.
The first person who put forward this interesting idea was my deskmate in my interest class. She is usually a very thoughtful person who once designed a clay sundial herself. At that time, after hearing this idea, we were all very excited and immediately collected materials to implement it. Unfortunately, it's probably because we are too impatient. The result of our first experiment was not as exquisite as we thought: the cover of the desk lamp collapsed and the battery could not be connected.
However, we are not discouraged, but continue to experiment to preserve its advantages and avoid its disadvantages. Finally, we finally worked out a satisfactory plan. We made a simple bracket for the cover of the desk lamp, and then spliced it with various kinds of clay, so that it won't collapse in when it is used. As for the circuit problem, after puzzling, we asked the science teacher to help us plan. We are very satisfied with the result of this experiment. Although this desk lamp is still on and off, it is a precious treasure in our life.
After the design of the desk lamp, our respective innovative notes turned a new page full of brilliance. It seems that we can all see the bright light reflected by it, which is not only the light itself, but also the light full of our efforts and sweat, which is the light of our dreams!
Everyone has dreams, but there are differences. My dream is to be a scientist and invent things that are useful to human beings like Edison.
As for why I have this dream, I think modern technology is still not convenient enough, so I want to invent something beneficial to mankind. I have thought about the direction of invention, that is, residence and travel, to make people more convenient.
Ideal is a cup full of water, reality is that cup, and the effort is to add water to it. If this glass of water is full, it means that you have successfully completed your ideal. Besides, you can only be happy if you realize your dreams, just like Francisco in Spain? Pizarro said: If you want to walk high, use your own legs! Don't let others carry you aloft; Don't sit on other people's backs and heads.
On this day, I got on the travel tool I invented. This is a spaceship that can sail at the speed of 30 million light years per hour, but it is the latest product. I started the spaceship and came to the 402 124 technology parallel universe discovered by human beings. This is the most developed universe, and today is an important day, because today I am going to test an epoch-making travel product newly invented by me-teleport machine. This machine can teleport to any position, which is a milestone in the history of human invention. When I arrived at the experimental site, many people paid the highest respect to me. The test has begun. The brave experimenter sat on the equipment and only heard a ding. They appeared in the target position, and the test was successful! My tears poured out like a torrent. I am so excited! My day and night work has paid off!
In order to become an excellent scientist, I read many science films and books about science. I basically customized the principle of my transmitter, first breaking people down into atoms and then assembling them in another place.
My dream is to be a scientist, which cannot be changed!
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!