Interesting little experiment composition 1 Sunday, I did a little experiment at home. Fill the cup with water, cover the mouth of the cup with paper, and then turn the cup upside down to see if the water will come out.
First, I found a transparent glass cup and a piece of white paper, and went to the kitchen to fill the cup with tap water. Then, I carefully covered the paper and gently covered the mouth of the cup with my hand, only to see that the paper was soaked by small drops of water. I'm a little worried. Turn the cup over slowly. Count five times in your mind and let go. A strange and interesting scene happened. The water in the cup didn't come out. What happened? I asked my mother inexplicably, "Why doesn't the water come out?" My mother told me that because objects in the air are affected by atmospheric pressure. The atmospheric pressure under the paper keeps the paper from falling, so the water will not flow out naturally.
I experienced the fun of scientific experiments.
Interesting little experiment composition 2 Today, the teacher said that he would take us to do an experiment of fireworks in water. I thought to myself: Can there still be fireworks in the water? So, I took this question and watched the teacher do the experiment. The teacher took out experimental tools from the hole in the table, including oil, glasses, paint and chopsticks.
The teacher first poured more than half warm water in one cup, oil in another cup, and two drops of three different colors of pigments in the cup full of oil. The teacher shook the cup gently, and the paint swam around in the oil like tadpoles.
Then, the teacher stirred the paint with chopsticks. Slowly, the pigment became small particles. After a while, the pigment sank to the bottom of the cup, blended with the oil, and slowly turned black, just like the cola we drank.
Finally, the teacher poured the stirred oil and pigment into the prepared warm water. At first, the oil floated on it, and then slowly sank. Some of them swim happily in the water like bugs, some fly like butterflies, and some dive like athletes in competitions. They are very beautiful.
This experiment is so interesting and beautiful. The experimental principle is that food pigment is soluble in water, but insoluble in oil, because the density of oil is lower than that of water and it will float on it. Colored liquids will start to sink because they are heavier than oil.
Interesting little experiment composition 3 Science is the door to human growth. It taught me a lot of knowledge, and it led us to explore the mysteries of nature; It is it that inspires us greatly.
One day, I read a story about ants, so I want to do an experiment: how many things can ants move? All right, then do as you say.
At the moment, I am preparing what I need for the experiment: first of all, the most important and necessary things in this experiment are ants, and some foods that ants like to eat, such as bread crumbs, rice and potato chips ... Well, we can start the experiment now. I sprinkled a little bread crumbs on the ground first, and then let the ants move it. After the ants touched them with their mouths, something magical happened. The ants were lifted up when they tried to move the crumbs. Then I took rice and potato chips to make it move, and it still moved at once. I asked it to carry heavier things again, only to see its tentacles shake a few times, as if to say, "Come and help me move food." After a while, a group of ants came to act together.
Finally, I came to a conclusion that ants can move things 400 times heavier than themselves.
I realize that the power of unity is great.
Interesting little experiment composition 4: I had nothing to do today, so I did a little experiment called "balloon sucking cup"
I'll take a clean cup, a balloon and a pack of paper first.
I started the experiment. I put the balloon in the cup first, and then I started to blow it. When the balloon fills the cup, the preparation process is completed. Who knows, I reached out and mentioned that the balloon rose, but the cup was not sucked up by the balloon, and I stamped my feet with anger.
Failure is the mother of success. With the previous lesson, my brain seemed to be lit up by someone and I came up with a solution. I first lit a piece of paper in the cup. After the paper went out, I took the balloon into the cup and blew it again. When the balloon completely supported the cup, I gently lifted the balloon and the cup together! I jumped three feet for joy.
Sister said: "Don't be too happy, there are many difficult experiments waiting for you in the future!" " "
After this experiment, I understand that as long as you keep trying, you will succeed. If you give up once you fail, you will miss success forever.
The teacher put the handkerchief into the water first, and then carefully. This means seriousness and respect. Now describe caution, I dare not neglect. ] strike a match and light a handkerchief. At this time, all the students stared. Describe concentration. ] Look at this handkerchief, "Cut!" Some students said, "Handkerchiefs will definitely not burn!" However, the handkerchief is burning and very prosperous. The teacher quickly buckled the bowl on the handkerchief. Let's guess what the handkerchief will look like. The students all said it was burnt out. Everyone stared at the teacher and saw that he had taken the bowl away. This handkerchief is in good condition! At this time, thunderous applause broke out in the quiet classroom, and everyone was discussing how the handkerchief wouldn't burn out. At this time, the teacher smiled and said, "Actually, I said that handkerchiefs are insured, which is an anecdote. A handkerchief that can't be burned makes sense. The water I soaked just now is 70% alcohol, and the fire is alcohol. As long as this 30% water is not dry, the handkerchief will not burn out.
Interesting little experiment composition 6 "I want to fly higher ..." Cheerful singing came from the classroom.
Since ancient times, mankind has had a dream, that is, "flying"!
Look, people imagine that the Monkey King can fly, Doraemon has a flying bamboo dragonfly, and the wizard sits on the magic flying carpet ... The feeling of "flying" is super cool!
Today's composition class, we also "flew", no, it made table tennis realize the "flying dream".
The teacher prepared experimental materials for us: a paper cup, a bottle of water and, of course, the flying protagonist-table tennis.
The experiment began, and the teacher showed us first. We stared at the teacher's every move curiously for fear of missing the surprise.
The teacher poured water into the paper cup, put the ping-pong ball in, and then gently lifted the paper cup over the teacher's head. We help the teacher count down: "3-2- 1, let go-"The paper cup falls freely. 1 of "pa-",table tennis suddenly jumped out of the paper cup, vertically upwards and flew out! Fly high and rush to the ceiling. ...
Table tennis has achieved a "flying dream", which is amazing!
Interesting little experiment composition 7 An interesting little experiment was done today.
I prepared a piece of white paper and a cup first, filled the cup with tap water, covered the cup with white paper, and immediately turned the cup over. I thought the water would wet the paper and then flow out, but the result was just the opposite. The paper is not wet and the water doesn't run out.
I don't understand why, so I asked my mother. My mother said mysteriously, "I don't know." Want to know why, check the information yourself! " "
I quickly searched the internet for information and finally found the answer. It turns out that water has air pressure, so it doesn't flow out.
Today, I am very happy, because I found an interesting secret, so I decided to observe more carefully in the future, and make better use of my observation eyes, listening ears and questioning brain. We are the successors of the motherland in the future, and we should work together to build our future motherland stronger and better.
Interesting little experiment composition 8 I found that this class is different from usual as soon as I started today: won't the Chinese class be transferred to the science class? What experiment are we going to do? i have a lot of questions.
The class began, and the teacher announced that this class would do a small experiment-let the eggs float. I saw the teacher carefully put the eggs in a beaker filled with clear water, and everyone excitedly stated their positions: heavy and floating. When everyone is arguing endlessly, the egg tells everyone with its own actions that it is heavy.
The teacher asked us: Is there any way to make the eggs float? Some people say sugar, some people say salt, some people say vinegar ... When everyone is quiet, the teacher puts a little salt in the cup and mixes it evenly, but the egg is lying motionless at the bottom of the cup like a shameless child. At everyone's suggestion, the teacher added a lot of salt. Under everyone's gaze, the eggs floated and sank for a while, making me sweat. Finally, in everyone's expectation, the eggs finally floated up, and I couldn't help but breathe a long sigh of relief.
Why do eggs sink in clear water but miraculously float in salt water? It turned out that salt was at work!
Today, I decided to do an experiment about rockets-rockets fly into the sky. This is my own whimsy. If I succeed, I can apply for a patent for scientific invention!
The materials needed for the experiment are simple: enough matches and a piece of cardboard. But I have no matches, so I have to beg my father. Father was surprised and asked, "Why do you need matches in this age?" I said mysteriously, "I want to use it for scientific experiments." Maybe my father also expects my great invention. He reluctantly said "yes" and I flew into the sky happily.
After a few days, the game finally came! I couldn't wait to tear open the package and started my scientific experiment with my precious matches: first, I rolled a piece of cardboard into a conical paper tube, and then stuffed the matches into the paper tube, so that my "rocket" was completed. Then I took it to the roof, found a clearing, lit one of the matches, and the other matches were lit together. The paper tube rocket flew under the impact of hot air. However, it crashed before flying high, and the rocket exploded and caught fire.
Although this is an unsuccessful experiment, it makes me feel very interesting.
Interesting little experiment composition 10 Today, the teacher gave us an interesting little experiment lesson. So, how interesting is it? Ha ha! You will know later!
"Ding Lingling …" The class began. The teacher walked into the classroom happily. He saw an empty mineral water bottle in his hand and said, "Today, let's do an experiment. Look carefully. First, put the empty bottle flat on your hand, then put the small paper ball on the bottle mouth, and then blow it hard. Do you think the paper ball ran in or out? " The students scrambled to say, "Run in, run in!" " It's my turn I said I was going out, but my classmates said it was wrong. The teacher asked me why. I said confidently, "Because the air pressure tends to be balanced, the gas in the bottle will rush out, so the small paper ball will fly to our faces like a bullet." The teacher said happily, "That's right! Great! " Everyone admires me!
I learned a lot of scientific knowledge through this experiment. This class is very interesting!
Interesting little experiment composition 1 1 I did a very interesting little experiment today.
Let's prepare a plastic ruler, or a plastic board and a piece of paper. Just tear the paper into small pieces.
How? Next, tell everyone about it!
First, rub a plastic ruler or plastic plate on your hair or clothes a few times, and then suck a small piece of paper. In that case, the little pieces of paper will dance happily! It was fun!
Why is this happening?
In fact, this is because there is static electricity generated by the friction of objects on the plastic board, and then the static electricity will suck up the small pieces of paper, so the small pieces of paper will dance happily! Do you understand this truth?
How's it going? Everyone must like doing this little experiment very much! Everyone doesn't stay at home to do this experiment, which is not only interesting, but also contains some scientific principles, so they will gain knowledge from playing.
Don't think I'm short, because this is my composition written in the third grade of primary school. I hope everyone will comment more and vote more!
Interesting small experiment composition 12 Today, the teacher arranged a small family experiment for us.
As soon as I got home, with my father's help, I began to get busy. The tools I need are: two bowls, five spoonfuls of salt and a raw egg. I'll pour the same amount of water into two bowls and add 5 spoonfuls of salt into one bowl, and then I can start the experiment. I put the egg into clear water first, and the egg sank to the bottom with a bang at the fastest speed. I put the raw egg in salt water again, but it "bounced" when I pushed it into the water. How to make it is "I like sleeping late on the water, but I don't like swimming underwater".
What's going on here? It turns out that the density of salt water is greater than that of water, which is the most fundamental reason.
As long as we observe attentively, think diligently and persist in studying science, we can constantly discover and harvest new knowledge.
Interesting little experimental composition 13 on Sunday afternoon, I came to the sunshine composition training class. I saw Mr. Tang say to us with a mysterious smile: "Hi, classmates, there are four new friends in our class today!" " "Suddenly, the audience was whispering, and everyone was curious. I wonder what medicine Mr. Tang is selling in the gourd. When the students looked around, I saw Mr. Tang take out four eggs from the drawer. Ah! So four friends are four eggs. Teacher Tang told us: "Today we are going to do a scientific experiment to turn the egg around. Three groups of competitions, which group of eggs turn fast and steadily, and you will know the secret of an egg after the competition! "After that.
Teacher Tang also showed us how to turn eggs. The students watched intently with wide eyes. The thought that the experiment can solve the mystery makes everyone excited and eager to try. The game has started. The competition is divided into two rounds, each with three people.
This interesting scientific experiment has enriched my scientific knowledge and broadened my horizons, which will inspire me to study scientific and cultural knowledge harder.
Interesting little experiment composition 14 Today, the teacher arranged a little experiment for us to do at home. Rub the newspaper with one side of the pencil and it will stick to the wall. I thought to myself: isn't this very simple? Piece of cake.
I cut the newspaper into small pieces and spread it on the wall, and then wiped it hard with one side of the pencil. As soon as I let go, the newspaper fell to the ground. I'm confused and at a loss. Under the guidance of my father, I thought ironically. I started the second experiment again, still holding a pen in my right hand and a paper in my left hand, lying on the wall for two minutes. Thought: you can let go. I released my hand carefully, and the paper didn't fall off, but stuck to the wall. I was both surprised and excited. I jumped for joy. Why? It turns out that any two objects will generate static electricity after rubbing. When the pencil rubs back and forth on the newspaper, there is a lot of static charge in the newspaper. Electrostatic charges attract objects, so newspapers are attracted to the wall.
There are many such experiments. If you want to do such an experiment, do it quickly!
Through this experiment, I understand that no matter what I do, I have to work hard and study to get different results.
Interesting little experimental composition 15 At noon, the teacher walked onto the platform with a smile. The teacher said, "Students, I'm going to do an experiment today." The students are thinking: What experiment is the teacher going to do? At this time, the teacher took out a glass of water and an egg. The teacher asked everyone, "If you put an egg in water, will it float or sink?" . Some students said, "It will sink." Some students said, "It will float." Some students said: "It should sink first, and then float up!" The teacher smiled and put the egg in the water, and it sank.
The classmate who made the first mistake kept looking at the eggs. The teacher took out a little salt and put it in the water. The egg still hasn't come up. Then, the teacher took out a handful of salt and poured it. Eggs will float. The student asked, "Why can these salts make eggs float!"
The teacher said, "Because eggs are denser than water, salt is denser than eggs." This incident has taught us to observe more and use our brains more.