In the winter vacation, I went to the Science and Technology Museum, visited the advanced technology there and was fascinated by it. So, I came up with the idea of doing small scientific experiments. 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 fixed it with double-sided tape. I made a hole at the end of the foam near the bottom of the paper cup, and the hydrodynamic boat was completed. I filled another washbasin with water, put the boat into the washbasin and filled the cup with water.
Suddenly, an accident happened. Because of the unstable center of gravity, the boat capsized. I thought that the back of the boat was too heavy and the front was not reinforced, so I capsized. Find the reason, I put a small piece of wood in front and reinforced it with wire. At this time, if you pour water into the paper cup again, the ship will not sink, but will move forward smoothly. Through this incident, I understand that to do anything, you must study and think carefully before you can consider all the problems you will encounter and succeed.
Today, Teacher Liu brought a cylinder and a cone, and we were puzzled. Teacher Liu said to everyone, "Today we are going to study cylinders and cones and do an experiment by the way." "Do experiments in math class." We are very confused. Teacher Liu, what medicine is sold in this gourd?
The experiment began. Qiyus 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, that is to say, the volume of the cone = sh. Let's go on with the second experiment. I scooped a ladle of water from the water with an awl and put it in the jar. Qiyus counted: "One scoop, two scoops, three scoops." We filled in the column, which means we succeeded.
This math class is over. Math class is really interesting. We learned a lot of knowledge and finished it interestingly.
Today, I am reading a book. I suddenly stood up and found a washbasin full of water, a piece of paper, a pair of scissors and six watercolor pens. I am busy looking for something.
What am I doing? Oh, I'm doing an experiment. I draw a picture of a six-pointed star on paper with a pen, cut out my favorite color on the picture, and then fold the six corners in the middle. 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 "tubes".
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 will find relevant information on the Internet and prepare experimental data. The candle must be lit first in the experiment. I picked up a match and got up the courage to paddle. It's terrible. I burned my hand. I immediately let go of 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. Then I dropped the candle in the center of the tray and fixed it. I further adjusted the yellow pigment, poured it into the tray, and observed the experimental process better 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 what this is about? 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 be reduced. At this time, the air pressure outside knocked 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.
Water and oil are indispensable things in life. The science soup teacher said that water and oil can't be combined. I want to do an experiment to verify it.
So I found a measuring cup, a glass of water and a cup of oil. Then I poured the water into the measuring cup first and then the oil into the measuring cup. At first, the oil sank, but it floated at an extremely fast speed. The oil slick first resembled a ball, but then the oil ball burst immediately. At that moment, it was like a soap bubble burst, but it burst more slowly than a soap bubble. After a while, the oil bubbles disappeared. Now the oil is above and the water is below. I wondered if it was uneven, so I took a chopstick and stirred it in a measuring cup, but it was slightly blended and slowly returned to its original appearance. I want to try it without changing the order, so I pour the oil first and then the water. The result is the same as last time: the oil is on the top and the water is on the bottom.
I want to know why the oil is above the water and below it. So I took my dad's cell phone to check. When high-density liquid and low-density liquid are in the same container, high-density liquid is at 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 poured white vinegar into the glass, and then carefully put an egg into the glass. White vinegar covers eggs 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 like 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 the eggshell was gone. It feels soft and elastic, and smells a strong sour taste, which is amazing.
Why do eggs disappear when soaked in white vinegar? I had a Baidu chat with my mother. It turns out that acetic acid in white vinegar can react with calcium carbonate, the main substance of eggshells, and consume calcium carbonate. Finally, only the membrane of the egg is left, and the hard shell is gone, and 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 is still a bit skinny. It smells a touch of traditional Chinese medicine. I looked at its crumpled appearance and thought I would peel it off. However, when I worked hard for a long time, I was desperate. No matter how hard I try, it just won't crack.
We put a boat-fruited Sterculia in a cup, and then add some boiling water. I thought it would sink like a stone, but instead of sinking, it floated up, and the tip kept bubbling, as if there was a little doll blowing soap bubbles at the bottom of the water.
Gradually, the tip completely cracked, like a reddish-brown aquatic plant.
After a while, the water slowly turned red. The teacher told us that if it is cracked for a period of time, the water in the cup can be drunk when it smells a little Chinese medicine. After listening to the teacher, I took a sip. Well, it does have a faint taste of traditional Chinese medicine.
This is an interesting experimental class, which shows me the embryonic form of boat-fruited Sterculia.
One day, my brother Li Chong and I went to do an experiment. We took a ruler or something first. Then take some small pieces of paper, the smaller the better.
Then suck a ruler at the small piece of paper to see if it sucks. Yes, the answer is no paper, alas! Why can't you bear it? Oh, I know. I don't rub it many times, so I rub it in the same direction. Then I took a ruler and sucked it. It's really different.
It is because of my low 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 generates the same amount of charges with the same polarity. Because opposite charges attract each other, they show 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. I decided to do an experiment, "Why don'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 in your right hand and turn it over slowly. Then slowly loosen the open 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 covers the cup so that the outside air can't enter the cup. When the cup is inverted, 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 smiled.
Small experimental composition 10 I have heard the phrase "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 prevent water leakage. Come and see with me if you don't believe me!
The experiment I am going to do today is to collect water with perforated paper. The experimental supplies I want to prepare are glasses, paper, rubber band, clean water and toothpicks. I'll take a piece of paper and punch some holes in it with a toothpick. Fill the cup with water and cover it 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 and thought: Will the water really not leak out? When I let go of my hand completely, the water really didn't leak out, so I was relieved. Finally, I poked the toothpick into the hole, but the water still didn't leak out. This paper is really amazing. I don't know what power 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 pull. Water doesn't leak out of pores because water has surface tension, and water forms a film on the surface of paper, so that water won't leak out.
This made me learn a new knowledge.
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 prepared to start the experiment I wanted to do. I followed the experiment book step by step. According to the experimental book, I dug out the touch panel of the periscope made of handmade paper and slowly folded it into a rectangle. I took out the double-sided adhesive tape, added it to all the edges, and let them fill together. In this way, half of the periscope is completed. I took out two more mirrors and put them in, but nothing could be opened. What happened? Am I wrong? There is something wrong with the mirror. Because the mirror is blurred, I went to the bathroom and washed it with soap many times, but it still doesn't work.
Suddenly, a piece of skin fell off the mirror. It turns out that the mirror is protected by a film. I took this film down, put it in, and finally finished it. I picked up the periscope and looked at it. I can see something ahead and look back. My little experiment succeeded. 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 full of 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. Oil is actually divided into many big bubbles, which fall slowly and rise slowly. I poured the remaining 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 quickly swam to the surface. At this time, they become light yellow oil on 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, insoluble in water and only soluble in oil.
My experiment succeeded! I watched my experiment dance.
Small experimental composition 13 Today, the teacher took us to do an interesting scientific experiment-friction electrification. On hearing the news, my heart is as sweet as honey.
The teacher first took out a rectangular piece of tissue paper, and then tore it into small pieces of paper and distributed it to us. Let's tear it into small pieces of paper. The little pieces of paper I tore off were like white ants. At this time, the teacher gave us a plastic pen to wear on our heads and wipe it back and forth. 10 seconds later, I gently put the plastic pen on the piece of paper. The paper flew to my pen like an enchanted spirit. It's amazing! Seeing this phenomenon, I am curious: "Will small pieces of paper really be 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 pieces of paper." After listening to the teacher's words, I suddenly realized.
This experiment is really fun!
Small experiment composition 14 We are going to do a small experiment-making bubble water. Mom just bought a bottle of glue. Our curiosity is like a match, which burns at once. My brother found a small cup from nowhere and put some detergent, glue, washing powder and hand sanitizer in it. We each took a straw and began to blow bubbles. We used to blow bubbles one by one and then suck them.
Then we created: Crystal Palace, an arrow through the heart, Crystal Flower, Crystal River and so on. And my brother is a cow! Him! Blowing from the fingertips to the armpit, what a beautiful bubble!
This little experiment is really fun!
Small experimental composition 15 I heard that a magnifying glass can concentrate light, and I want to do an experiment to prove it.
First, I bought a magnifying glass. I took a piece of paper and went to the small balcony. My father and I started an experiment. The sunshine on the balcony is fierce and the temperature is very high. In the sun, my father fiddled with a magnifying glass for a long time before adjusting the angle. Sweat is dripping down. Just as I was getting impatient, my father suddenly shouted, "Catch, catch!" " Come and have a look. "I soon heard the news and was surprised to find a small hole burned on the paper. I am puzzled: what is this?
I took the magnifying glass from my father and fiddled with it like my father. When my hands tremble, the dots on the paper will move and sway. Dad took my hand and said seriously, "don't move, or I won't touch it." After a while, the paper really burned again.
Through this experiment, I believe that a magnifying glass can really focus light and burn things, which I have observed myself. This experiment is really interesting, really interesting!