Chapter 1: interesting experiments
Today, let's do a little experiment! Then the teacher took out a plastic ruler and some shredded paper.
The students opened their eyes and thought what the teacher would do? The teacher said, "I'm going to use this ruler to stick these scraps of paper together.". The students whispered and couldn't believe it. At this time, the teacher wrapped the ruler tightly with a piece of cloth and rubbed it back and forth forcefully. After a while, the students in the front row touched it and said aloud, "it's hot"! So the teacher put the ruler close to the scraps of paper, and the students all stood up and stretched their necks to look at the ruler. Suddenly, the nearest student cried out: "suck up"! At this time, everyone's eyes were fixed on the ruler. Sure enough, the ruler was covered with scraps of paper. It was amazing! The students can't help but clap their hands. The teacher told us that the ruler can suck up the paper scraps because the ruler and cloth generate static electricity, which sucks up the paper scraps.
The students suddenly realized.
Part two: interesting experiments
Today, the teacher gave us an assignment, that is to do vinegar bubble egg experiment.
When I got home, I took an egg from the kitchen, washed it out and put it into a bowl. Then I filled the bowl with vinegar. At this time, the egg made a & lsquo; Zizi & amp; sound.
The next morning, I found a film on the egg shell and a layer of white bubbles floating in the bowl. When I went to see it in the evening, the egg changed. I touched it with my hand. Why, the hard eggshell became soft. I picked it up, not good, I accidentally dropped it on the ground, I quickly let my mother see, my mother told me, this is because the eggshell contains calcium, calcium and acetic acid in vinegar dissolve, the eggshell becomes soft.
Oh, so it is. Chapter 3: interesting experiments
Today, there is an assignment is to do vinegar bubble egg experiment. When I got home, I put down my schoolbag and went to the kitchen to do the experiment. I took out an egg with a little white color and put it into the bottle. Then I poured some vinegar into the bottle until all the eggs were soaked in vinegar. At this time, I found that the egg floated and stuck out the small head. I pressed it with my hand, but I was disobedient and insisted on showing the small head. The next morning, after I got up, I couldn't wait to wash my face and brush my teeth. I couldn't wait to run to the kitchen to see what happened to the eggs. I found that the color of the egg shell is similar to the color of vinegar. When I press it gently with my hand, I find that the egg shell is softened. When I take the egg out of the vinegar, I find that the whole body of the egg is cracked, like a fishing net. The lines on it are like the veins of leaves and the capillaries of human body. I worry about the lightning in the air & hellip; & hellip; why? According to the information on the Internet, it is the result of chemical reaction between acetic acid in vinegar and calcium carbonate in egg shell.
What an interesting little experiment!
Chapter 4: interesting experiments
Today, when I was in a tutorial class, the teacher said, "put the things on the desk in your schoolbag. "We heard very strange, think: what kind of medicine is sold in the teacher's gourd. We looked at each other as we thought.
The teacher said: 'let's do an experiment! "Good! "Some of the students cheered, some were thinking about what experiment? Suddenly, the teacher unknowingly took a few napkins from his pocket and let us tear them into small pieces. Then, the teacher asked two students to rub the wall and blackboard with a ruler, and then suck these scraps of paper. As a result, they could not be sucked. So, the teacher said, "everybody rub your hair with a ruler and a pen, suck the scraps of paper, and see if it's sucked up? 'we listened, tried it, and really sucked it up.' it's amazing! "It's fun! '& hellip; & hellip; the students said that many people are different, and the teacher said:' this is friction electrification. "Through this interesting little experiment, I learned the principle of friction electrification.
Chapter 5: interesting little experiment
Today, I did an interesting little experiment called half an egg. First of all, I took the plastic gloves I prepared and put them on my hands. I gently broke open the eggshells and saw two and a half small eggshells in my hands. After I broke the two eggshells, I put one of the eggshells upright and the other upside down. After putting them, I observed that the one lying upside down was standing there motionless, while the one standing upright was shaking left and right like a tumbler. It was very interesting. After a while, it finally failed to hold on and he fell down.
This experiment proves that the eggshell that is put on the shelf lasts a short time. While doing this experiment, I realized a truth: we must believe in science.
Chapter 1: interesting chemical experiment Li Jiaheng
In chemistry class, our group did an interesting experiment called 'flying saucer'.
There are three people in our group, Cao Hanwen, Li Yuliang and I. First of all, take the motor, wind blade, two battery boxes, four batteries and key materials. Then, according to the picture in the book, connect the materials and put the battery into the battery box. Then, press the small iron on the key down for a while, and then suddenly release, the wind blade on the motor flies up, like a flying saucer flying, as the name implies!
The principle of this experiment is very simple, that is, after pressing the small iron plate, the circuit is connected, and the motor drives the wind blade to rotate. Once released, the motor will stop rotating. Due to inertia, the blades are still rotating, so there is a downward airflow. It is because the downdraft pushes the blades that they fly.
This experiment not only gave me knowledge, but also was very interesting.
Interesting chemical experiments
Today, the teacher asked the students to say that there are three cups on the table, one is an empty cup, one is filled with sand, and one is filled with sand. There is also a bag with stones and a bottle with half a bottle of sand. Then the teacher grabbed a handful of stones from the bag and put them into the water one by one. Then the water overflowed. Then, pick up a few stones and put them into the sand. The stones are on top of them and just stay on them.
The teacher continued to fill the empty glass with some stones and asked, "is there anything else in it? "As soon as the voice comes down, 'Neng' comes out of the mouth. 'what can it hold? "When the teacher asked, the students said," you can put sand in it. "Then the teacher put the half sand bottle into the glass without saying a word. The sand flowed in. Then the teacher asked the old question 'you can still hold water.' the students answered, and then the teacher added the water, and the sand on the stone went in with the water. After doing this experiment, I understand Learning is endless. It seems that knowledge is rich, but it is not enough. Chapter 3: interesting chemistry experiment Yu Gaotian
One noon a month ago, my grandmother was planting vegetables. I was observing the growth needs of plants. Looking at it, I had a question in my heart: if I pull out the vegetables planted and then plant them again, can a vegetable survive? So I asked my grandmother. She laughed and said, 'try it yourself and see the result. Don't you know? 'grandma said, and gave me the knife.
I picked up the scalpel and found a good dish. Suddenly, I saw a big and green vegetable in front of my eyes. I picked up the knife and pressed it hard. I pulled up a big and green vegetable. Next, I replanted the vegetables in the soil. In order not to mix up with other vegetables, I specially found a small stick and inserted it in front of the vegetable. After finishing, I came to the vegetable every day when I got home from school, but a month later, the vegetable still didn't grow tall. After a few days, the vegetable gradually turned yellow and died! I ran to ask my grandmother, who said with a smile, "sweet, once a plant is pulled out, its root will be broken, so no matter how it is pulled out, the plant must be eaten or thrown away on the same day, otherwise it will turn yellow. 'I listened to my grandmother and laughed happily.
Interesting chemistry experiment Xu Xinyi
This afternoon, I saw an interesting "blowing balloon" experimental game in the pictorial of "we love science", so I asked my father to do this experiment with me.
We put the glass drink bottle, bowl and Thermos Pot on the table one by one, then put the balloon on the bottle mouth, and then put the drink bottle into the big bowl. Dad picked up the thermos and poured the hot water into the big bowl.
Dad and I waited for a long time, but the balloon was flat. Dad looked at the balloon carefully and found that it was the balloon with a hole. Dad told me to get all the balloons. Dad looked at each balloon carefully and finally found a perfect one. Dad put the balloon on the glass drink bottle and put it in hot water. The balloon puffed up slowly, as if by magic. I said happily: 'it's a success! My father asked me, 'why does the balloon bulge? I said: 'it's because the air in the glass bottle expands when it's heated. '
Through this experiment, I got an inspiration, that is: no matter what you do, you should use your brain and be careful.
Interesting chemical experiments
Today, I did an interesting little experiment with a raw egg.
I took two plastic pots of the same size, added the same amount of water respectively, and put the raw eggs into one of the pots. The raw eggs immediately fell to the bottom of the pots and lay there. Next, put the raw eggs in another basin, and then put some salt. The raw eggs lie on the bottom of the pot. With more salt added, the raw eggs float up slowly and stand on the bottom of the basin. Why? I looked up information on the Internet, it turns out that this is the role of buoyancy, adding salt in the water will increase the density of the liquid, the buoyancy of the water will increase, so raw eggs can float.
In the future, I will observe more things around me and discover more secrets in science.