In the winter vacation, I went to the Science and Technology Museum, visited the advanced technology there, and was fascinated by it. So, the idea of doing small scientific experiments came into my mind. When I got home, I started the experiment without saying anything. First, I brought a piece of foam, a paper cup, scissors and double-sided tape. I started making. I cut off the protruding part at the bottom of the paper cup, and then fixed it with double-sided tape. I made a hole at the end of the foam and near the bottom of the paper cup, and the hydrodynamic boat was finished. I filled another washbasin with water, put the boat into the washbasin and filled the glass with water.
Suddenly, an accident happened and the boat capsized because of its unstable center of gravity. It occurred to me that the back of the boat was too heavy and the front was not reinforced, so it turned over. Finding the reason, I put a small piece of wood in front and reinforced it with wire. At this time, pour water into the paper cup again, and the ship will not sink, but will move forward smoothly. Through this incident, I learned that I have to study and think carefully before I can consider all the problems I will encounter and succeed in doing anything.
Today, Teacher Liu brought a cylinder and a cone, and we were very puzzled. Teacher Liu said to everyone, "Today, we will learn cylinders and cones and do an experiment by the way." "Do experiments in math class." We are puzzled. What medicine is sold in this gourd by Teacher Liu?
The experiment began. Qi Siyu and I chose two experiments. Let's fill a cylinder with water first and then squeeze it with a cone. So the volume of the cone can be calculated. I hold a cup full of water and squeeze it with a cone. We carefully put water into the cone, just two cups, which means that the volume of the cone = sh. We went on to do the second experiment. I took a ladle of water from the water with a cone and put it into the cylinder. Qi Siyu counted: "One scoop, two scoops, three scoops." We filled the column, which means that we have succeeded.
This math class is over. The math class is really interesting. We learned a lot of knowledge and finished it interestingly.
Today, I was reading a book. I suddenly stood up and found a washbasin full of water, a piece of paper, scissors and six watercolor pens. I'm getting busy looking for something.
What am I doing? Oh, I'm doing an experiment. I draw a picture of a six-pointed star on the paper with a pen, cut out the color I like on the picture, and then fold the six corners to the center. Finally, put the six-pointed star into the water. At this time, it is like a flower.
Why is this? I read the experimental principle in the book. It turns out that this experiment uses capillary phenomenon, that is, like plants absorbing water, water permeates along cracks. Because the main material of paper is plant fiber, there are also very thin "pipes".
When water seeps into these "pipes", the paper begins to swell, and then every corner blooms like a flower.
Small Experiment Composition 4 During the winter vacation last semester, I did a magical little experiment called "water-absorbing cup".
"Before doing the experiment, I'll look for relevant information on the Internet to prepare the experimental data. The candle must be lit first in the experiment. I took a match and got up the courage to paddle. That's awful. My hand burned. I immediately released my hand, and the match fell on the table. I quickly blew it out again. Then, with the help of my mother, I lit the candle. After that, I dropped the candle oil in the center of the tray and fixed the candle. I further adjusted the yellow pigment and poured it into the tray to better observe the experimental process with colored water. After tightening, I put the cup near the candle, and covered the candle with the cup. Miraculously, the water in the cup rose by about 1 cm. Do you want to know how this works? It turns out that the burning candle in the cup consumes the oxygen in the cup. When the candle goes out, the pressure on the cup will also decrease. At this time, the air pressure outside beat the water into the cup. This experiment proves the existence of atmospheric pressure. Scientific experiments need bold, meticulous and meticulous observation.
There will be a lot of gains in this process. I like scientific experiments.
Small experiment composition 5 Water and oil are indispensable things in life. The science soup teacher said that water and oil can't be combined, so I want to do an experiment to verify it.
So I found a measuring cup, a glass of water and a cup of oil, and then I poured the water into the measuring cup first, and then I poured the oil into it. At first, the oil sank, but it floated up at an extremely fast speed. The floating oil was first in a state similar to a ball, but then the oil ball burst at once. At that moment, it seemed like a soap bubble burst, but it broke more slowly than the soap bubble. After a while, the oil bubbles disappeared. Now the oil is on the top and the water is on the bottom. I wondered if the mixing was uneven, so I took a chopstick and stirred it in a measuring cup, but it blended a little and slowly returned to its original appearance. I wanted to try it without changing the order, so I poured the oil first and then the water, and the result was the same as last time: the oil was on top and the water was on the bottom.
I wonder why the oil is above the water and below. So I took my dad's mobile phone to check. When the liquid with high density and the liquid with low density were in the same container, the liquid with high density was on the bottom, and vice versa. So water is denser than oil.
Small Experiment Composition 6 Last Friday, I did a small experiment-soaking eggs in white vinegar.
I first pour white vinegar into the glass, and then carefully put an egg into the glass. The white vinegar covers the egg more than 3 cm. Then, put the cup on the table and carefully observe the changes of the eggs.
I found that as soon as the eggs were put into the white vinegar, many small bubbles immediately rose from the bottom of the cup and floated on the surface of the white vinegar, dense as small water droplets. The next day, I went to see the changes of eggs, and found that the eggs seemed a little bigger and the eggshells turned white. On the third day, I found that the eggs in the cup were completely transparent, and I could clearly see the yolk inside. I took the egg in my hand and found that all the eggshells were gone. It felt very soft and elastic, and smelled it with a strong sour taste, which was amazing.
Why do eggs disappear when they are soaked in white vinegar? My mother and I checked with Baidu. It turns out that the acetic acid in white vinegar can react with calcium carbonate, the main substance of eggshell, and consume calcium carbonate. Finally, only the membrane of the egg is left, and the hard shell is gone, so the egg is naturally soft.
This experiment is so interesting that I can learn such wonderful scientific knowledge. I will do this little experiment again in the future.
Today, we did an unusual experiment. This experiment is not to turn eggplant into cucumber, nor to depilate rabbits, but to show the prototype of "boat-fruited Sterculia". This boat-fruited Sterculia is actually not fat, but it still has a little skinny feeling. It smells like a faint smell of traditional Chinese medicine. I looked at its wrinkled appearance and thought that I must be able to peel it off. However, when I tried my best for a long time, I was desperate. No matter how hard I tried, it just refused to crack.
Let's take a boat-fruited Sterculia and put it in a cup, then add some boiling water. I thought it would sink like a stone, but instead of sinking, it floated up, and its tip was bubbling constantly, as if there was a little doll blowing soap bubbles at the bottom of the water.
Gradually, the tip completely cracked, like a brown-red aquatic plant.
After a while, the water slowly turned red. The teacher told us that if it cracked for a while, the water in the cup could be drunk when it smelled a little of traditional Chinese medicine. After listening to the teacher, I took a sip. Well, it really had a faint taste of traditional Chinese medicine.
This is an interesting experimental class, which shows me the prototype of boat-fruited Sterculia.
One day, my brother Li Chong and I went to do an experiment. We first took a ruler and something like that. Then take some small pieces of paper, the smaller the better.
Then suck the ruler at the small piece of paper to see if it sucks. Yes, the answer is no paper, alas! Why can't you suck it up? Oh, I know. I don't rub many times, so I rub more in the same direction. Then I took a ruler and sucked it. It was really different.
It is because I have less friction that small pieces of paper can't be sucked on the ruler.
Next, I will tell you about the adsorption principle of static electricity. When an object with static electricity is close to an object with points on the other side, due to electrostatic induction, the inside of the object without static electricity is close to the same amount of charges with the same polarity, and the other side produces the same amount of charges with the same polarity. Because the opposite charges attract each other, it shows electrostatic attraction, which is the principle of electrostatic adsorption.
Finally, I think this kind of experiment is very interesting, and I like doing experiments very much.
Small Experiment Composition 9 Today, my mother and I saw many small experiments on TV, and I decided to do an experiment "Why doesn't the water in the cup pour out?"
We prepared a cup, a piece of paper and a basin of water first. Then pour the water into the cup and cover it with paper. Then cover the paper with your left hand, hold the cup with your right hand and turn it over slowly. Then slowly loosen your hand on the paper. Through the experiment, I was surprised to find that the water would not pour out at all.
Why is this? I quickly checked the internet, and it turned out that the cup was full of water and there was no air. The paper covered the cup so that the outside air could not enter the cup. When the cup is turned upside down, the pressure of the rising air outside the cup lifts the paper, so that the water will not flow out.
The experiment we did succeeded! I jumped for joy, and my mother grinned.
Small experimental composition 10 I have heard the saying "draw water with a sieve in a bamboo basket". How can a basket with holes be put into the water? It will definitely leak light. To tell you the truth, I have a way to keep the water from leaking. Come and see with me if you don't believe me!
Today, the experiment I'm going to do is to collect water with perforated paper. The experimental supplies I want to prepare are glasses, pieces of paper, rubber bands, clean water and toothpicks. I take a piece of paper first, and use a toothpick to punch some holes in the paper; Fill the cup with water and cover the cup with a piece of paper; Then fix the paper with a rubber band; Then hold the cup mouth with your hand and turn the cup upside down. I slowly let go of my hand, wondering: Will the water really not leak out? When I let go of my hand completely, the water really didn't leak out, and I was relieved. Finally, I poked the toothpick into the hole, but the water still didn't leak out. This piece of paper is really amazing. I don't know what force is used to firmly attract the water.
It turns out that the thin paper can hold up the water in the bottle because the atmospheric pressure acts on the paper, resulting in an upward pulling force. Water will not leak out from the pores because water has surface tension, and water forms a film on the surface of paper, so that water will not leak out.
This made me learn a new knowledge.
Small experimental composition 1 1 Today, the teacher asked each of us to make a periscope. As soon as school was over, I couldn't wait to run home and make a periscope.
When I got home, I took out my toolbox and was ready to start the experiment I wanted to do. I did it step by step according to the experiment book. I dug up the touch panel of the periscope made of handmade paper according to the experimental book, and slowly folded it into a rectangle. I took out the double-sided adhesive tape, added the double-sided adhesive tape to all the edges, and let them fill it together. In this way, half of the periscope was finished. I took out two more mirrors and put them in, but I couldn't open anything. What happened? Am I wrong? Or is there something wrong with the mirror Because the mirror was blurred, I went to the bathroom and washed it with soap many times, but it still didn't work.
Suddenly, a piece of skin on the mirror fell off. It turned out that the mirror had a film to protect it. I took this film off, put it in, and finally finished it. I picked up the periscope and looked at it. I could see something in front of me and look back. My little experiment was successful. I really like doing experiments, which will bring me many surprises, discoveries and happiness …!
Small experiment composition 12 Today, my father and I are going to do an interesting small experiment-oil-water separation.
I first find a small bottle with a lid and a cup filled with water, and then put a spoonful of oil into the bottle. Then, I poured the water into the bottle bit by bit, and something magical happened. The oil was actually divided into many big bubbles, which fell slowly and rose slowly. I poured the rest of the water into the bottle, and after careful observation, I found that many small bubbles gradually rose at the bottom of the bottle, and they quickly swam to the surface and separated.
I closed the lid tightly and shook it vigorously. The liquid in the bottle suddenly turned milky white, producing countless small bubbles and swimming to the surface quickly. At this time, they become light yellow oil on the top and water on the bottom.
Why is this? It turns out that the density of oil is smaller than that of water, and oil is fat-soluble and insoluble in water, but only soluble in oil.
My experiment succeeded! I watched my experiment dancing.
Small experiment composition 13 today, the teacher took us to do an interesting and fun scientific experiment-friction electrification. On hearing the news, my heart was as sweet as honey.
The teacher first took out a rectangular piece of tissue paper, then tore the rectangular tissue paper into small pieces of paper and distributed them to us, asking us to tear the small pieces of paper into small pieces of paper. The small pieces of paper I tore off were like white ants. At this time, the teacher gave us a plastic pen and asked us to put it on our heads and rub it back and forth. After 10 seconds, I gently put the plastic pen on the scraps of paper. The scraps of paper flew to my pen like an enchanted elf. It's amazing! Seeing this phenomenon, I am curious: "Is it true that small scraps of paper are enchanted?" Later, the teacher told us: "This is because the friction between the plastic pen and the hair produces static electricity, which sucks up the small scraps of paper." After listening to the teacher's words, I suddenly realized.
This experiment is really fun!
Small experimental composition 14 We are going to do a small experiment-making bubble water. Mom just bought a bottle of glue, and our curiosity was like a match, which immediately burned. My brother found a small cup from nowhere, and put some detergent, glue, washing powder and hand sanitizer into it. We each took a straw and began to blow bubbles. We originally blew bubbles one by one.
After that, we created: Crystal Palace, an arrow through the heart, crystal flowers, crystal river, etc., and my younger brother is a cow! He! Blowing from the fingertips to the arm nest, what a big, beautiful bubble!
This little experiment is really fun!
Small experimental composition 15 I heard that the magnifying glass has the ability of concentrating light, and I want to do an experiment to prove it.
First, I bought a magnifying glass. I took a piece of paper and came to the small balcony. I started an experiment with my father. The sunshine on the balcony is fierce and the temperature is very high. In the sun, my father took a magnifying glass and fiddled with it for a long time before he got the angle right. Sweat was dripping down. When I was getting impatient, my father suddenly shouted, "catch, catch!" Come and see. " I quickly heard the news and was surprised to find a small hole burning on the paper. I am puzzled: what is this?
I took the magnifying glass from my father's hand and played it like my father. When my hand shakes, the dots on the paper move and vacillate. Dad took my hand and said seriously, "Don't move, or I won't be able to touch it." After a while, the paper really burned again.
Through this experiment, I believe that a magnifying glass can really focus light, thus burning things, which I have observed myself. This experiment is really interesting, really interesting!