Interesting experimental composition 1 On Sunday afternoon, I participated in the interesting scientific experiment activities of Dezhou Evening News reporter in the north campus of New Hunan Road Primary School.
Science is wonderful and sometimes elusive. Look, our reporter is grinding his head with a ruler. What are they doing? I muttered to myself. The teacher asked us to put the paper on the table, and a miracle happened. Incredibly, the scraps of paper were sucked up by the ruler. The teacher told us that static electricity is generated when the ruler rubs against the scalp, so that the scraps of paper can be sucked up.
The second experiment is inseparable from two books. Overlap the pages of two books, and then drag them to both sides. Guess what will happen? The result is that it won't open, and it seems to stick together. The teacher told us that this is because the overlapping parts of the two books have friction, so they can't be separated.
The third experiment is Hercules paper. How strong will a small piece of paper be? We took a cup full of water, put a piece of paper on it, pressed it hard, and then turned the cup upside down. The water didn't come out, and the paper stuck firmly on it. I can't believe my eyes. The teacher explained the experiment to us again: because the water cup is pressed tightly by the paper, the outside air can't get in, so the water will naturally not flow out when the water cup is inverted. We also did an experiment of a small diver.
I will study harder and explore the mysteries of science.
Everyone has seen small ants, but have you observed them carefully? I made an interesting experiment with these little ants.
I first brought some mothballs, found some ants and began to do experiments. I first used a mothball and an ant to do the experiment. I took out the mothballs and drew a white line in front of the ants. I saw the ants turn left and right and quickly bypassed the defense line. I drew a white line in front of the ant, and it poked around as if looking for a way. Soon, the ants successfully found the exit. I think ants are very clever. I drew a circle around the ants with mothballs. Ants suddenly bumped into each other like headless flies, but they couldn't get out. I narrowed the circle a little patiently, and a miracle appeared. Look! The ant stayed in the circle for a while, but rushed out of the encirclement and ran out, but it seemed that he couldn't find his way home. I have done several experiments in succession and the results are the same. I'm a little confused. How did ants break through the tight encirclement and run out?
Ants circled with mothballs really couldn't run out, because the smell of mothballs blocked the smell left by ants when they crawled, so the ants couldn't find their way home, but they managed to get out of the encirclement.
Through this experiment, I found a truth: no matter how difficult the situation is, we must work hard so as to succeed and solve the mystery.
Have you ever heard that matches can go? Some people may say: this is impossible, but I think it is possible. Look!
In class today, the teacher led us to do an experiment-"Race Walking". First, the teacher prepared these things: matches, knives, soap, pens, rulers and water. I thought to myself: This experiment must be wonderful. My classmates and I brought a match, first put a ruler on the table, then took a pen and began to strike matches. Divide the match into four equal parts, take a quarter and start cutting. Remember to be careful. But I brought soap, cut the soap into small pieces with a knife, remember to be thin, and put the small pieces into the cut matches. The fortress is flat and complete. "Remember not to put more than a quarter of matches." Hearing the teacher's instructions, I suddenly became nervous for fear of exceeding the quarter. The phrase "you can't eat hot tofu if you are impatient" can really be reflected in me, and it is almost more than that quarter. I thought: maybe it will fail. Then I was more careful. When the checkpoint calmed down, I carefully put the match in, and it worked! Do you know why? Because the water molecules on the water surface produce surface tension under the action of water, and the soap liquid will weaken the surface tension of the molecules, which leads to the surface tension of water in the matchstick part is greater than that in the tail part.
After listening to my introduction, you must be tempted. What are you waiting for? Hurry up and experiment!
Interesting experimental class composition 4 Today we are going to do experiments in the experimental classroom. I'm so happy. When you come to the experimental classroom, the first thing you see is the experimental equipment, including tripod, alcohol lamp, beaker, basin and small sink. Seeing this, I am thinking at the moment: Will the teacher give us goggles and white gloves? Really looking forward to it!
After class, the teacher said to us, "Students, today we are going to learn the separation of salt and water." "Students, do you think salt will melt in water?" The teacher asked. We said with one voice, "No." The teacher added: "No, if you put too much salt, some will not melt." Then the teacher asked, "How do students think salt can be separated from water? "The students' answers are very strange. After listening, the teacher said, "Well, let's see if you are right." The teacher lit our alcohol lamp. On the way, I saw that the water turned into steam, but the salt was not brought to the sky at all. The experimental results came out. We looked at it with a magnifying glass, and the salt was stuck, but it was still shiny.
In this lesson, I learned that salt can be separated from water, but after separation, they can stick together and shine.
Today, we came to the experimental class. I thought the teacher would give us goggles and gloves, but I guessed wrong.
The first thing I saw was the experimental table, namely: salt, measuring cup, spoon, tripod, alcohol lamp, asbestos net, basin and small sink. Let's make our own position. I am closest to the experimental equipment.
At the beginning of class, the teacher said to us, "Students, today we are going to learn the separation of salt and water. Do you think salt will dissolve in water? " "Yes!" The students said in unison. "Let's look at this basin. There is evaporated salt left over from the last class experiment in the basin. The team leader handed it over. " After a while, the team leader brought back the pots, and the teacher poured salt water into each pot. Then, the teacher lit a fire with a piece of paper and lit the alcohol lamp. We observe carefully. After a few minutes, I found that the salt water gave off gas and bubbles. I keep waiting and waiting. Suddenly, I found that the salt water turned white and bubbles appeared under the white salt water. If you don't look carefully, you will think that bubbles are white, too. I waited and waited, and found the salt jumping out of the basin. "Wow." I'm surprised.
After class, I am very happy, because I had an interesting experimental class.
Interesting experiment composition 6 Last week in science class, the teacher asked us to take plasticine, wood blocks, table tennis, rubber balls, glass bottles, foam, iron sheets, pebbles and other items to prepare for the scientific experiment.
After the experiment, the teacher said to us, "Now do an experiment to see what can sink in the water." What can float in water? "Through experiments, students know that plasticine, iron sheets and small stones will sink when put into the water, while wood blocks, table tennis, foam and glass bottles can float in the water. The teacher asked again, "how can I make plasticine float in the water?" "I crushed plasticine by hand, then wrapped it in foam and threw it into the water. As expected, plasticine floated. When the teacher saw it, he shook his head and said, "Let the plasticine float, and nothing else can be used. "I must find another way. I squeezed plasticine into the shape of a boat and then carefully put it into the water. The plasticine boat floated on the water. I was so happy that I quickly invited my teacher to see my "masterpiece". The teacher smiled and nodded, and my heart was filled with joy. The teacher asked again, "can you make the glass bottle sink?" "Hearing this, I held the glass bottle high and threw it into the water. I thought I could sink, but the glass bottle climbed up quickly after drilling to the bottom.
At this time, I thought that when I was swimming, I could float with my breath held, and my breath would sink. So I opened the glass bottle cap, let the glass bottle die and fill it with water. At this time, I saw the glass bottle shake a few times and sink. Doing experiments by hands is fun and interesting, and you can learn a lot.
Interesting Experimental Class Composition 7 After today's special class, we had the most interesting class I have ever had-the science lab.
After the special class in the afternoon, I quietly hurried into the science lab. As soon as I entered the laboratory, fresh air came to my face. Wow, the science lab is really a science lab! There are too many scientific materials to count. I was assigned to my group and the teacher gave us experimental props. We are all curious and always want to start the experiment at once.
The teacher first brought us into the content of this lesson: what is the relationship between the magnitude of friction. Then I assign tasks. My team experimented with different friction forces at different weights. We'll talk about the rules later. Our rule is to pull empty cars first, and then add check codes to the empty cars one by one to see how the friction changes.
Then, we started the experiment.
The first time you empty the car, the friction is 0. ② cattle; Later, a hook code was added, and the friction was 0. Four cows. So we come to a conclusion that the magnitude of friction is related to weight, and the heavier the weight, the greater the friction; The lighter the weight, the less friction.
Later, we reported the results, and the teacher asked us to summarize them, which was better than the classroom.
We visited the science lab again, looked at the specimens, and then the class was over.
"Ah, why is this class so short? It passed in a blink of an eye. "
We left, but the students were still talking about the science experiment class.
This course is really good!
Interesting Experiment Lesson Composition 8 The fifth lesson this morning was an interesting science lesson, but today is different, because we are going to have a science lesson in the science lab.
In front of the science lab, we were divided into four groups, each with five people. I am with Song. When everyone entered the science lab, we saw five tables neatly arranged on the ground. There is a tripod, a rice basin on the table (the rice basin was changed because the school didn't buy it), an asbestos net (the thickness of the bottom of the rice basin doesn't need asbestos net), and an alcohol lamp under the tripod. The teacher said that mixing salt with water in the sun would separate salt from water. Because it was raining today and there was no sun, we poured salt water into the rice basin, put it on the tripod and lit the alcohol lamp under the tripod. After a while, there was only salt left in the basin. Then put out the alcohol lamp. The teacher also said that when putting out the alcohol lamp, cover it with a lid twice. After the teacher finished speaking, we operated with the teacher.
The science class this morning was really interesting.
Interesting experimental class composition 9 Today we had our first experimental class.
First, the teacher told us what to learn in this class, so we began to observe. What we are studying is whether salt is soluble in water. First, the teacher lit a fire for us and covered the evaporating dish. We saw that there was nothing in the water at first. After salt is slowly dissolved in water, the water slowly evaporates. At this time I thought: Can salt really dissolve water?
We continue to observe that when the water evaporates slowly, some salt will come out. Less and less water, less and less, the water finally disappeared, and the teacher put it out with a lamp cap. We began to observe that some people said that the salt turned yellow, some people said that some places now look like the skin of cantaloupe, and some people said that the salt would change color when it evaporated. ...
This lesson soon ended, and I learned how water dissolves salt and how my face changes after dissolution. This is our interesting experiment class! An unforgettable experimental class that made everyone happy for the first time.
Interesting experimental composition 10 We did an experiment in Miaobi Chinese teacher this afternoon. Just after class, the teacher came into the classroom with a big smile and asked everyone, "Did you blow balloons?" "Blow." We answered. The teacher asked again, "Have you ever heard of bottles blowing balloons?" "No." We shook our heads and said. The teacher said, "Today, we are going to do an experiment. Bottles blow balloons. " As soon as the teacher spoke, he took out empty bottles, funnels, baking soda, white vinegar and balloons from his bag. The teacher poured some baking soda on a lid for us to taste. I dipped my finger in it and licked it with my tongue. "wow! It is salty. " The teacher also let us smell white vinegar, which is really bad.
The experiment began. We craned our necks and stared at the teacher pouring a third of the white vinegar into the empty bottle, then put the funnel on the balloon mouth, add a spoonful of baking soda to the balloon, and then put the balloon on the bottle mouth. Finally, pour the baking soda from the balloon into the bottle. At this time, I saw that the transparent white vinegar turned milky white, like boiled water, like bubbles spit out by small fish, and made a "whirring" sound. The balloon also changed, first flat, then gradually enlarged, like eggs, like light bulbs, and finally like melons. We cheered in surprise: "The experiment is finished! Our experiment was successful! "
Just then, the teacher asked us why the balloon could be blown up. We shook our heads. Next, the teacher told us the principle of the experiment: baking soda mixed with vinegar will produce carbon dioxide gas, and the balloon will be blown up by carbon dioxide gas.
This experiment made me understand that science is around us! We should love science from childhood.
Interesting experimental composition 1 1 At the weekend, the teacher gave us an interesting experiment-eggs floating.
On this day, we came to the classroom early and saw glass rods, glasses, a packet of edible salt and some eggs on the podium. We are all particularly curious, what is this for? It turns out that we are going to do experiments today, and everyone is looking forward to it!
When the teacher came, she carefully put an egg into the water first, and the egg slowly sank to the bottom like a diver. Then, the teacher put a little salt and mixed it evenly. The egg swayed for a while and sank to the bottom. Then, the teacher continued to put salt into the water. This time, the teacher put enough salt and mixed it evenly. Miracle happened, and the egg floated slowly.
You must be curious! Why do eggs float? It turns out that when salt is added to clean water, the density of water will increase, the buoyancy will also increase, and the eggs will float.
Did you find out? As long as you pay attention, life is full of scientific knowledge.
Interesting experimental composition 12 "Floating! Gone with the wind "In the laughter, we are having an interesting experiment class.
The experimental materials are: beaker, water, eggs, salt and chopsticks. First of all, Miss Zhao carefully put the egg into a beaker filled with water, only to see the egg jump a few times in the water and hide at the bottom of the cup like a little girl.
Then, Miss Zhao poured the salt into the beaker and stirred it evenly with chopsticks. Eggs spin around chopsticks, just like a little girl dancing in circles. When water and salt are dissolved into one, the egg dances like a ballet dancer standing on one leg, showing people its beautiful posture. Teacher Zhao put salt several times in a row, and the eggs floated up bit by bit. Until the fifth salt, eggs surfaced, quietly surfaced like naughty elves, looking at this beautiful nature.
This experiment shows that salt water has buoyancy, and the buoyancy is greater than that of clear water, so eggs can float in salt water. This experiment is not only interesting, but also makes us understand the scientific principles. It's killing two birds with one stone!
Interesting experimental composition 13 Today is a day I am looking forward to, because we should go to the science lab.
When we entered the science laboratory, we saw a big map of the earth's surface. Some parts of the earth's surface are blue, some are yellow, some are white and some are green. Blue represents the sea, yellow represents the plateau, white represents the white clouds and green represents the plain. The class has begun. We learned about friction. The science teacher talked about Niu N, and then began to do experiments. The experiment done by our group is weighing. We first carefully watched how the team leader did it, and then it was our turn to do it ourselves. Each of us measured 0.2 N and reported the result.
It's time for the second experiment. We put 50 grams of weight on it and measured it. The final result is 0.4 N. In the third experiment, we put two weights. This time, the result is 0.6 N. We started to report again. The result that our group got from it is that friction has a great relationship with weight.
This class will be over soon. I really hope to get to the next science experiment class soon!
Yesterday, the teacher asked us to go back and prepare a spoonful of salt. At that time, I wondered why we always had to prepare a spoonful of salt. I thought and walked. I thought I was going to learn to cook.
Is that really the case? I didn't know that the teacher was going to do a mysterious experiment until today. At first, the teacher brought a transparent, wide and big glass, filled it with half a bowl of water, and put an egg in it. Only with a thump, the egg dived gracefully into the beautiful underwater world like an experienced old diver. This is the teacher's question: "If you put these salts in, will the eggs sink or float?" "sink!" "Don't float!" The teacher's words caused an argument among the students. Then the teacher put the salt we brought in. After the shiny salt particles entered the water, they began to spread apart, just like a heavy snow, with white awns everywhere. Even so, we can still see the egg teacher stirring with a pencil again. At this moment, no one needs to shout "Look! The eggs are floating! " We support the floating team and cheer loudly.
The teacher said that this experiment proved that there was a lot of salt in the Dead Sea, so people could float up. The students nodded in confusion, so an interesting experiment ended in the middle of the class.
Interesting experimental composition 15 The annual "Zhiyuan Xingfang Science Classroom" began. The students came to the bright classroom with great excitement, looking forward to this interesting and magical experiment.
The experimental class has begun. The experiment we did was "electrified newspaper". The students listened to the teacher carefully and did experiments with relish. Step one, put the paper flat on the wall; Step 2, rub the newspaper with the side of the pencil; Step three, take away the pencil and loosen the hand holding the newspaper, and the newspaper will stick firmly to the wall. Just as everyone was having fun, the bell rang, and we left Class 9 classroom and walked to the next experimental classroom.
The next day, the students happily did interesting experiments such as "obeying orders", "bouncing table tennis" and "jigsaw relay", among which I was most interested in "crazy coins". This experiment is amazing. The first step is to fill the cup with water until it overflows. Step two, pushing coins into the water from the edge of the cup mouth; The third step is to see if the coin floats. In this experiment, I tried nine times before I succeeded in floating the coin on the water. It turns out that there is a film on the surface of water, which is formed by the surface tension of water. It is the surface tension that makes coins float on the water. But this kind of film is easy to be destroyed, so we successfully made the coin float on the water by pushing it into the water from the edge of the cup.
Small discovery, big science; Small discovery, big change. The scientific community is waiting for us to discover and change. Let's explore the unknown scientific world together!