Interesting experimental composition with comments?

Doing experiments is one thing to test our hands-on ability. In the process of doing experiments, we will find it interesting to do experiment

Interesting experimental composition with comments?

Doing experiments is one thing to test our hands-on ability. In the process of doing experiments, we will find it interesting to do experiments because of some reaction phenomena. The following are my essays and comments on interesting experiments, hoping to help you!

One afternoon, when I was reading a happy diary, I saw an interesting experimental diary. I suddenly thought of an automatic watering experiment, so I decided to do it myself.

Do it. I went upstairs and got a pot of flowers. Then, I brought a disposable water cup filled with water, and then put one end of the gauze strip in the water and the other end in the flowerpot. After I finished, I waited for the results of the experiment with great expectation. After a while, I found that there was a little less water in the cup. I felt very curious, so I picked up the gauze at one end of the flowerpot and wanted to have a look. It turned out that water dripped slowly from the gauze strip into the flowerpot.

Through this experiment, I decided to observe life carefully and increase my knowledge.

The language of correcting comments is dull, not descriptive and not prominent.

Interesting experimental composition 2 Last class on Friday afternoon, we did an interesting little experiment.

I prepared paper, brushes, water, white vinegar and candles for this fascinating experiment on Wednesday.

The exciting moment has finally arrived, and the teacher of the experimental class first demonstrated it to us. Prepare a piece of paper first, then light a candle, then pick up the paper and bake it on the fire. Be careful not to light the paper. After baking for a while, the teacher picked up the paper and showed it to us. The words "month" and "day" are clearly displayed on the paper. The teacher asked us why there were words on the paper, and everyone said in unison, "Words are written on the paper in advance."

The teacher smiled gently and taught us how to write secret words. We can write an invisible word on paper with water or white vinegar or other colorless liquid.

Finally, the teacher asked us to do it ourselves. I used a brush dipped in white vinegar to write a word' big' on white paper, and I was busy baking beside the lit candle. This is really not an easy thing. Suddenly the paper caught fire. I threw it on the ground in a panic, the fire went out, and a big hole appeared in the middle of the paper. I saw the classmate at the back, and he baked a word' person'.

I wrote another word and dried the paper. This time, I carefully put it on the fire and roasted it left and right. The paper was burned and the words were not displayed.

I tried harder and finally succeeded in baking a' good' word. Looking at the results of your own efforts, my heart is sweeter than honey.

The little experiment is really interesting!

The practice of correcting comments echoes from beginning to end, highlighting the interest of small experiments. The practice of describing the experimental process of "baking words" with action description, language description, psychological description and expression description highlights the magic of scientific secrets and tells us that only by knowing the truth can we do things better.

Three weekends, I wrote a book and introduced an interesting experiment: fill a cup with water, cover the mouth of the cup with paper, and then turn the cup upside down so that the water won't flow out. I think this is incredible. How can a thin piece of paper hold a large glass of water?

I'll start doing it with a grain of salt. First, I found a transparent glass cup and a rectangular piece of white paper, went to the kitchen, filled the cup with tap water, and then carefully covered the paper. Then, I put my hand over the mouth of the cup for a while, turned the cup upside down and counted to one, two, three, four and five. Let go of my hand. Hey! God, this paper really holds water. How is that possible? How can a small piece of paper hold a glass of water? I have tried several times, and there is no doubt that this is a truth.

In order to show off the success of my experiment and have a higher success rate, I decided to perform my magic in front of my parents with half a glass of water.

In order to make the atmosphere full of mystery, I learned to be a magician, play music and use a chopstick as a wand. I turned the cup upside down for them to see clearly, put the white paper in front of them to see clearly, then poured half a glass of water, covered it with paper, pressed it gently with my hand in the order just now, and turned it upside down. In order to improve the magic pleasure, I put the cup on my head, count to one, two, three, and then let go! Suddenly, I was dumbfounded, I became a drowned rat, and I froze. Dad, mom is holding her stomach and laughing very hard.

Mom said: change clothes quickly. Dad said: check online quickly.

It turns out that a piece of paper can't hold a glass of water. The real magic is atmospheric pressure. When the cup is filled with water and covered with paper, the atmospheric pressure in the cup is lower than that outside the cup, and the atmospheric pressure outside the cup presses the paper, so the water cannot flow out. Half a glass of water is lighter than a glass of water, but half a glass of water and half a glass of air can't control the atmospheric pressure, so the water flows out.

Through this experiment, I learned two things:

1. About atmospheric pressure, atmospheric pressure exists in our life, which creates magic for human beings, such as drinking drinks through straws, cupping therapy in traditional Chinese medicine, infusion and so on.

Second, it taught me not to imagine anything out of thin air, to have evidence, to be good at observing things, to be good at research, and to find problems.

Correction comments In this article, the author details the experiment conducted at home on weekends and describes the experimental process in detail, which is rich in content. Through this experiment, the author understands two truths. The article is complete in structure and clear in level; The disadvantage is that the language is too colloquial and inaccurate.