Elementary school students in the sixth grade Chinese write an essay on the results of the experimen

In today's science lesson, the science teacher led the students to do an interesting experiment.

What this experiment is trying to prove is: "recoil force".

As soon as I started class, I saw the teacher walking into the classroom with a "balloon cart". The students in the first row all tilted their heads up to look at it. Then, the teacher said:

Students, please turn to page 75 of the textbook. Today we learn about recoil! The noisy classroom suddenly fell silent.

The teacher lifted the balloon cart and saw that there was a small racing car chassis with a balloon on it. "When we blow up the balloon, when it is blown and released, the gas ejected from the balloon will produce a force in the opposite direction of the ejection, which is called the recoil force. "The teacher blew the balloon up hard, blocked the mouth first, and as soon as it was released, the balloon walked up with the cart!

The classmates opened their mouths in surprise. "That's too godly, isn't it? "yes, yes......Then, the teacher did a very typical experiment:

Take the balloon off the trolley first......As soon as the students saw that the teacher was going to do another experiment, their eyes were immediately attracted. Then, the teacher blows the balloon up and then releases his hand. I saw that the balloon was heading in the opposite direction of the gas spew, and immediately ran out of gas and fell straight down.

At this moment, "Jingle Bell......"The bell rings for the end of class" Students, this class is here. Class. "Stand up!

Goodbye, teacher! ”

This is the end of a fun science lesson......

One day, we were looking at the science books as we normally would, waiting for the teacher to come and give us a science lesson. After a while, the teacher came in, cleared her throat and said to us, "Students, let's do an experiment today.

Immediately, the students cheered because this was our first time doing the experiment. We quietly followed the teacher to the science lab, and it was very large, the size of two classrooms. I saw that the experimental equipment was already waiting for us on the table.

The teacher showed us first, and she skillfully picked it up. I saw that the students were watching intently, staring at every action made by the teacher. The teacher said after doing it:

When turning on the alcohol lamp, be sure to pay attention, otherwise it will happen**. When the students heard this, they were all terrified. "Next, please do it once in a group.

The teacher said. Everyone in our group was scared, afraid that the alcohol lamp would blow them up, and they didn't dare to take the lead. At this point, we had to guess and decide.

Rock-paper-scissors. "Haha, Huang Yuheng lost. He said:

You didn't just say that you lost first. "He's so sloppy? When I usually see him so strong, I think he is very bold!

Unexpected, so timid. So, we had to do "rock-paper-scissors" all over again. "Ah--- I can't help but scream, I lost. I'm going to start doing it.

I thought to myself: I can't be religent, I'm the squad leader, I can't do this, I must succeed.

The materials in front of me are: iron stand, alcohol lamp, test tube clamp, glass, glass piece, match. I brought the iron stand in front of me.

Pour about 500 ml of water into a glass, place a mesh on the iron stand, and place the glass on top of the mesh. Then use a test tube clamp to clamp the glass piece. At this point, it's time to light the alcohol lamp.

What to do? What to do? My heart is like fifteen buckets of water--- seven up and eight down.

But I can't back down! That's what my heart thinks. I finally decided to insist, I carefully and meticulously swiped the match, at this time, I saw that the people in our group were far away from me, and I knew that they were afraid that they would **.

Please, don't be so cowardly," I shouted to them. Even though I said that, I was actually scared too. I slowly lit the alcohol lamp from the bottom up.

I carefully placed it underneath the wire mesh. On top of which I put a slice of glass on top of the glass. At this point, we wait for the rain to form.

After 3 minutes, I saw that the other people who were slower than us just now had raindrops. But why hasn't our group yet. To be on the safe side, we consulted with our teachers.

The teacher said, "Of course you can't pull so much water. In this way, we were scolded by the teacher.

Then, we learned the lesson of our last failure, and this time, we just put 200 ml of water. "Success, success" The people in our group cheered, happy for my success, and at this moment, my heart was also sweet.

This experiment taught me that science is magical, and as long as we dare to experiment boldly and think boldly, then we will succeed.