First, the writing guidance of scientific experiments
2.3 demonstration articles about scientific experiments
First, the writing guidance of scientific experiments
1, examination questions
Write a small experiment you have done, and it must be an experiment you have done yourself.
2. Material selection
As long as you have done small experiments yourself, you can write them, such as restoring flat table tennis, deodorizing the refrigerator, making lanterns, lighting small bulbs, boiling water in paper cups, using a little newspaper, and catching balloons. ...
Step 3 conceive
Let's take "floating eggs in water" as an example to conceive and recall the scene of a small experiment.
Experimental name: Float eggs in water (omitted)
Experimental preparation: eggs, glass bowls, water, salt and baking soda (omitted)
Experimental process: (detailed)
Step 1: Pour water into a glass bowl.
Step 2: Put the egg in the water, but it won't float.
Step 3: Add baking soda to keep the eggs from floating.
Step 4: Add salt. With the increase of salt, eggs will float.
Experimental results: Salt water can make eggs float on the water. (omitted)
Step 4 show
If you want to make the article attractive, you may wish to start from the following aspects: ① It will be more attractive to talk about the experimental content or one of the phenomena, for example, my buttons will get bigger and the cups will get out of hand; Write clearly the process of doing the small experiment ... then ... then ... and finally ... "with the sentence pattern of" first ",and you can also write down your mood during the experiment. Remember to use some good words and sentences accumulated at ordinary times!
2.3 demonstration articles about scientific experiments
Model essay 1: "An interesting scientific experiment? 》
One sunny noon, as soon as I walked into the house, I saw a mysterious smile on my mother's face and said, "Today, we will do a little experiment to give you a surprise." My second monk was puzzled, but he walked into the room with his mother excitedly. ?
On the table in the room, my mother has prepared the experimental materials in advance: a ruler, a piece of A4 paper and a napkin. My mother said mysteriously, "First take out A4 paper, tear it into small pieces, and then rub it on your head 30 times with a ruler until your scalp is hot." I didn't finish listening to my mother's words, so I quickly tore A4 paper into pieces, took out a ruler and wiped it on my head three or four times. I can't wait to put the ruler on the paper, but there is no response. Mother said aside, "Wipe it at least 30 times and put the ruler gently next to the paper." This time I did what my mother said seriously, but A4 paper fell off as soon as it came. Mom said unhurriedly, "Maybe A4 paper is too heavy. Try another napkin. " I got a little impatient and jumped down from my seat and said to my mother, "What's the matter?" Say and angrily sat on the bed. Mother shook her head and said quietly, "Failure is the mother of success. Be patient." Mother put the ruler on her head, wiped it thirty times, and touched a piece of paper gently with the ruler. The paper flew with the ruler, as if it had been sucked away by the ruler. Seeing this, my anger has already vanished and I applaud my mother happily. Mother said, "This is my experiment. What about yours? " ?
I regained my confidence, picked up a ruler and rubbed it back and forth on my head. After a long time, I felt my head burning. I gently put the ruler on the piece of paper. As soon as I searched, three or four pieces of paper were sucked up at the same time, and some were like monkeys fishing for the moon, hanging upside down. Some lie quietly and comfortably on the ruler; Others, such as divers, fell off the ruler again. That's great. I jumped three feet for joy. ?
After this experiment, I benefited a lot and was deeply impressed, and understood the principle of electrostatic friction. I will do more work and think hard in the future.
Fan Wen 2: "liquid that can blow balloons?" 》
Students, have you ever seen a liquid that can blow balloons? If you haven't seen it, just follow me and do it yourself! ?
First, prepare a balloon, baking soda, white vinegar, funnel and a bottle. Then put the balloon on the small mouth of the funnel, pour baking soda into the funnel and let the baking soda leak into the balloon. Then I took out the bottle and poured the white vinegar into the bottle. Only heard a "glug", the vinegar in the bottle rose slowly. Soon, white vinegar accounts for one-third of the bottle, so much white vinegar is enough. Finally, remove the funnel from the balloon, put the opening of the balloon on the bottle mouth, and then pour the baking soda from the balloon into the bottle. Suddenly, like the fog in the bottle, it is hazy, and the fog floats out to the bottle mouth. The balloon will stand up slowly. If you look closely, there will be many small bubbles floating up from the bottom. You will find that the balloon will get bigger and bigger. ?
If the reaction between baking soda and white vinegar is over, no gas will be produced and the balloon will not become bigger. If there are a lot of baking soda and white vinegar, their reaction will produce a lot of gas, and the balloon will keep getting bigger. I put too much baking soda and white vinegar in my experiment. I was concentrating on observing the bottle when suddenly the balloon exploded with a bang. I thought someone was setting off firecrackers outside, which scared me. So don't put too much baking soda and white vinegar, or it will give you a big surprise?
Why do liquids blow balloons? It turns out that the reaction between baking soda and white vinegar will produce carbon dioxide gas, which will blow up the balloon. ?
What you get on paper is shallow after all, and you have to practice it. To learn more knowledge, we need to practice it ourselves. Let's soar in the ocean of knowledge and discover more new discoveries. ?
Fan Wen 3: "Small experiments are great fun? 》
Recently, my mother and I did a very interesting little experiment. Let me share it with you now! ?
Mother first found a plate, a bottle of pepper and a bottle of detergent in the cupboard, and then found a penny hard pen in her wallet. Then, she asked me to fill the plate with clear water, put the coins in the clear water and spread the peppers on the clear water. Peppers danced like snowflakes and threw themselves into the arms of clear water. Mom said mysteriously, "Can you take the coins out of the water now? You can only use your hands. Can't you stick pepper on your fingers?" I thought to myself, "this is not easy to handle? If you put your hand into the plate quickly, you will succeed. " I immediately put my hand into the plate and took out the coin. Oh! Shit, my fingers are all pepper. My mother smiled, and her mind was full of doubts. What else can I do? Mom said, "squeeze out a little detergent, spread it evenly on your index finger, and then get the coin and see what the result is?" I looked puzzled and thought, "Will pepper stick to my finger again?" I did as my mother said. Just when my index finger touched the water, a miracle happened. Just as people saw the noble king, all the peppers scattered and hid shyly at the edge of the plate. I put my hand in, not only got the coin at once, but also my hands were clean. I was so happy that I almost jumped for joy, yeah! I made it! ?
However, why does pepper scatter? I'm confused. My mother asked me, a little experimenter, to find the answer by myself. I quickly checked the information, and found that the reason why the pepper would disperse when it met the detergent was that the surfactant contained in the detergent destroyed the surface tension of water and the water film, so that the lighter pepper could not be taken away by the water film, so the pepper would stay away from the detergent. Although I can't understand these meanings at all, the process and results of the experiment have opened my eyes and made me feel the fun of doing small scientific experiments. ?
Does everyone think it's funny God is not magical? Then play quickly!
Now, do you know how to write this topic? Please feel free to leave a message if you have any questions.