In my impression, there are three explanations for the composition article 1 science in the sixth grade. One is science books, the other is science and technology, and the third is science in nature. Let me choose these. They all seem to be right. However, if I had to choose one, I would choose three.
What is science in nature? For example, how do people make airplanes? I think everyone knows. It observes and studies flying animals, such as bees and flies. If we don't observe them, it will take a lot of effort to build an airplane. Now, I think everything is clear. There are many things in nature that people don't know. Like an unsolved mystery. If we humans break one, knowledge will increase and science will progress. So, I also broke one, because I didn't know anything before. It's badly broken.
One day I saw a word, vegetable oil? Where did it come from? Peanut is also a plant. Why is there no oil? I think this principle must be overturned. I took a delicate piece of paper. It says: vegetable oil. It's oil. Let me add fuel to the fire. The oil is slippery. This is the characteristic. Look for it if you have characteristics. I embarked on a journey to find vegetable oil ... Walking, I found a small red bean with a length of 1 cm and a width of 1 cm. I thought to myself: this thing is a plant. Just dissect it and take it out. So, I dissected it. I don't know if I didn't see it, but I was shocked when I saw it. It's slippery inside. I was shocked. Make a fire quickly and put the small beans into the fire. Brush, the fire becomes several times bigger. Although I failed, I was so happy. Because, I finally know. As for peanuts. I also understand that peanut oil is invisible to the naked eye. It's in there. First, let me remind you. You must have a scientific basis to speak.
So to believe in science, only science is truth. Don't trust any gods or ghosts. What is the basis?
Some people don't know how to care for trees, but they hurt trees, make small animals lose their homes and let tornadoes take advantage of them. What a terrible thing. What is even more unbearable is that environmental protection workers get up early and work in the busy roads every day. How dangerous! But some people still litter everywhere. Now the living standard has improved, and air conditioning and heating have reached every household. However, with the improvement of living standards, the air is getting worse and worse. It seriously affects our quality of life and threatens people's lives. I thought to myself, I also want to be a scientist to help mankind solve these problems.
First of all, I want to invent a seed that can propagate quickly. As long as this seed is sown in the soil (it must grow in the soil), the land will be full of trees within a few minutes. I want to turn the desolate Yuan Ye into a dense forest, and turn the bare barren hills into homes for small animals.
I also want to invent a robot vacuum cleaner, which can clean the whole city at an amazing speed. In order to help the robot work, I also want to invent a trash can that can automatically sort garbage. This trash can has a special sorting function and is a good helper for robot cleaners.
For the sake of human health, I also want to invent an "environmental protection hut", which can filter automobile exhaust, gas, factory exhaust and so on. This will be more conducive to people's health.
I think at that time, we won't see a desolate land, nor will we see cleaners sweeping the floor on the road. Instead, it will be a beautiful new world of green mountains and green waters, birds and flowers. This is my greatest wish.
There are many scientists I admire, such as Edison, Newton and Ai En Stein ... Among them, Galileo is my favorite. This is a scientist who taught me how to study hard and work hard.
Galileo's father was a bankrupt aristocrat. Since Galileo came to this world, his family has been extremely poor. In order to earn money to support his family and his wife, his father also plans to earn money to send him to school, hoping that he will become a cloth dealer when he grows up.
After school, Galileo is diligent and studious. He is always the first to raise his hand to answer the teacher's questions. Galileo was particularly interested in machinery. As soon as he saw the machine, he wanted to try it. Whenever a child goes to play, he secretly hides on the other side to study and often makes some small toys on campus. Later, Galileo studied Latin, Greek and philosophy, and Galileo's father gave up the idea of making him a cloth dealer. Galileo likes math, too. His father plans to make him a doctor of medicine when he grows up. However, because his family was poor, Galileo dropped out of school and went home. At home, he studied, invented the pycnometer and wrote a book "The Center of Gravity of Solids", so Pisa University asked him to be a professor of mathematics.
On another occasion, Aristotle said: an object with 10 kg and an object with 1 kg fall from the same place at the same time, and the speed is ten times that of 1 kg. This theory that goes against the laws of nature has become people's protection, because Aristotle once said the theory of "the center of the earth". Galileo proved this theory wrong with his own experiments.
Galileo's contribution deserves my admiration. I will study hard and make greater contributions to my motherland like Galileo when I grow up.
I looked at the sky and couldn't help sighing, thinking: The weather was fine just now. It didn't rain early or at night, and it began to rain as soon as I went out. When I was worried, my mother asked me to drink wolfberry tea. As soon as I saw Lycium barbarum tea, I became interested in it immediately. Because I saw a lot of Lycium barbarum floating on the top of the cup and a few Lycium barbarum at the bottom of the cup, 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 that can float on the water.
I started doing small experiments. First, 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 in the water. Then I took off my chopsticks to see if the Lycium barbarum would sink. I saw the Lycium barbarum sink slowly. Then I put a wolfberry on the bottom of the teacup with chopsticks and took off the chopsticks. The wolfberry 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 little 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
The fifth weekend, I have nothing to do. I looked through the science textbook I just bought. I really don't know. After reading it, I was shocked and found some interesting little sciences in my life. I decided to practice to see if it was accurate.
Other experiments were too difficult to do, so I made a simple one-"beer shoeshine". First of all, I put the shoes that have stepped on countless dirty things into the basin and prepare the beer; The experiment began. I opened the beer, poured a full bottle into it and said silently, "Dad, I'm sorry you haven't drunk beer for two days." I took the brush in my hand and poured the beer on my shoes. After 30 minutes, I washed them and put them on the balcony to dry.
Blink of an eye, already yellow dizzy. I came to the balcony and took a closer look. Hey, is this my whore? Just a new pair of shoes. Ha, you can wear "new shoes" in the future! I jumped three feet for joy.
I will teach my parents this method when they come back from home. They praised me as a little scientist.
Science in life is endless, and it is really worth our efforts to explore!
On Saturday, I was bored and looked at the eggs turned over on the table.
Suddenly I remembered the composition that the teacher asked us to write: "My first scientific attempt", so I immediately bought a book about scientific experiments and began to read it carefully.
I have prepared many props: eggs, salt, water, a glass and a spoon.
The experiment began. I stared at the steps written in the book and thought: What experiments can eggs do? This is a fragile thing, and I look forward to the completion of the experiment. I am excited and a little nervous, and my palms are a little sweaty. I first put a smooth egg into the water according to the method in the book. I carefully observe whether the eggs sink or float in the water. At this moment, the egg we saw was lying on the bottom of the water. Then I put a spoonful of salt in the cup to see if it was still lying. After a while, I was surprised to find that the egg was put in a layer of "snow" and stood up slowly, dancing left and right like a person dancing in the water. I put another spoonful of salt in the cup. At this moment, something incredible happened. Originally, the egg stood upright in the water, but now it wakes up like a beautiful woman from a dream, and a small brain tip pokes out. "It's amazing!" I'm not surprised at all. I cried. "Do you want to know why?" Actually, the specific gravity of water is 1. If you put something heavier than 1 in water, it will sink, while something lighter than 1 will float. Because the specific gravity of salt water is greater than that of eggs, that is to say, the buoyancy of salt water is greater than that of clear water, so eggs can float in salt water. After listening, we suddenly understood the truth of adding salt to the water.
I love science. This experiment tells me that we should pay attention to careful observation in our daily life, so that we can discover many scientific mysteries.