How to write a small experiment essay, how to write a small experiment essay

The composition of the small experiment is as follows:

Today, I did an interesting little experiment for my classmates - blowing bubbles. The experiment was very simple, requiring only a small bottle, a little water, a few drops of detergent, and a thicker straw. I put these items on the table, and my classmates looked at me curiously, what kind of experiments can these things do?

I first pour the water into the pre-prepared vial, and then pour the detergent into the water. Next, I put the prepared straw into the water, stirred it in a clockwise direction a few times, and then carefully took it out. I watched everyone in the brigade, and they were all looking at me very intently.

At this point, I took a deep breath and gently blew the lead ruler into the straw.

Suddenly, a small bubble appeared at the other end of the straw. The students looked at this round and sparkling little bubble, and they suddenly became interested and eager to try. So, I handed out the straws that I had prepared in advance, and each of them blew out many bubbles, and all of a sudden, colorful bubbles floated in the classroom, turning into a bubble travel cover world.

At this time, I don't know who asked, "Why do you blow bubbles?" "yes, why is that?

Everyone, you look at me, I look at you with a lead ruler, and then turn your eyes to the teacher for help. The teacher looked at everyone's puzzled looks, smiled and said, "Let me tell you the reason for the formation of bubbles in the dismantling of the riots."

When water and detergent are mixed together, the surface of the water molecules and detergent molecules is sticky, forming tension.

The mutual attraction between molecules on the surface of water is greater than that between water and air, as if they were glued together. If the water brigade hoods are over-bonded together, bubbles will not easily form. The surface tension of the water is 'broken' by dismantling the agitation and the washing spirit reduces the surface tension to 1 3 only under the usual conditions, which is the optimal tension required for the bubble, so the bubble is formed.

How to write an experimental essay is as follows:

1. After dinner today, I did two experiments. For the first experiment, you need to prepare a washbasin, a tap water glass, and a paper ball. First, take half a bottle of water from the washbasin, then tear some paper and knead it into a ball, and put the paper ball into the bottom of the cup.

Next, place the cup vertically in the water, so that the paper in the cup will not get wet at all.

It turns out that if you put the cup vertically in the water, the paper will not get wet at all, because the air in the cup cannot get out, and the water should not come in, which means that the air occupies the space of the water. But if you put the cup diagonally into the water, the paper ball will be soaked right away, because the air goes out, and the water has to come in, and this is the space that the water occupies the air.

The second experiment required the preparation of a washbasin, running water, and a plastic bag. I filled the basin with water, filled the plastic bag with air, tied it tightly like a balloon, and then pressed it into the basin, and I found that it would not sink down, and the water was bubbling and bubbling, which made me feel very strange.

If you fill the bag with water and press it down, there will be no bubbles in the water, and the bag will sink. This is because the air quality is lighter than water and will float on the water. The Italian scientist Galileo Galilei said:

All reasoning must be derived from observation and experimentation. "Science is only meaningful if it is done by itself; Experiments must be done to succeed. I love experimenting, I love science, I love science!

Min Bury smiled. 2. I read a book about the potato experiment, this experiment doesn't require much things, but it's very interesting, and I want to do it again. The experiment is simple: first cut the potatoes with a knife, then take out iodine and apply it to the cut surface of the potatoes.

The book says that the potatoes should be discolored at this point. However, I didn't see the potatoes change color. I think:

What's going on? I obviously put iodine wine! Is there not enough material, or is the time not coming?

Or is it simply not going to work out by doing so?

I hurried to my mother's bridge and asked why. The mother smiled and said: "Silly boy, the time you used is too short, now the time is almost up, you can take a piece of paper, hail and draw on it with potatoes."

My mother's words inspired me a lot. When I looked at the potatoes again, sure enough, the potatoes turned gray. I pressed the potatoes to write on the paper, and found that the words written with potatoes were bluer than one stroke, haha, the experiment was successful!

Although the experiment was successful, I wanted to know more about the principle of this experiment. It turned out that this experiment was a chemical process. Since potatoes are mostly made of starch, iodine wine is basically made with iodine.

When they combine with each other, there is a chemical reaction that gives rise to the color blue. Through this experiment, I learned that being a scientist requires patience and dedication to succeed.