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Pay attention to life, and learn everywhere. One day, I came across this passage in a book: "Coins can dance on a Coke bottle!" "But I pondered and meditated, but I didn't find the secret.
So, I started reading a lot of books, looking up information, and asking my well-informed grandparents. I came to the bookstore to look for relevant books; I turn on the internet and look for relevant information; I asked my grandparents to record the relevant ......It dawned on me that I finally understood the mystery.
It turns out that cola contains a large amount of carbonic acid, and when salt is added to cola, the salt melts in carbonic acid, which produces a large amount of carbon dioxide gas. Placing a coin in the mouth of the bottle will seal the carbon dioxide in the bottle. As more and more gases increase, the pressure in the bottle increases.
If this pressure exceeds the weight of the coin, the coin will tilt, causing the carbon dioxide in the bottle to escape, but then the coin will fall again due to its own weight. As a result, there is a phenomenon where coins can dance on a Coke bottle.
Now, the truth is out and I'm in high spirits.
For our eyes, it's not a lack of beauty, it's discovery.
This article ** junior high school essay, I am also going to publish an essay.
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Galileo discovered the principle of isochronism in the swing of the chandelier, a do-good man discovered from a game that sharks are afraid of yellow objects, and I also learned from the phenomenon of cats eating grass that cats eat grasslands because they have a bad stomach.
It was a Sunday a few months ago, and I was playing in the yard after breakfast when I suddenly noticed that the neighbor's big white cat was eating grass from my garden. Hey! What's going on, aren't cats carnivores, how can they eat grass?
I was so surprised that I went home and looked for books like the Encyclopedia, but I searched through them and found no reason why cats eat grass. Hey, what the hell is going on with cats eating grass! I sighed and thought:
Either way, I'm going to have to figure out what it's like for cats to graze! From then on, whenever I had time, I would carefully observe the ...... of the big white catThe emperor paid off, and finally, I found that every time the big white cat ate grass, it would pull out thin. Maybe the big white cat eats grass because it has a bad stomach?
I guess. It just so happened that a few days ago an aunt came to my house, she is a veterinarian, so I asked her what was going on, and told her what she thought, and she said to me, "Your idea is right!"
I jumped three feet high with joy, and I finally learned the knowledge through my own efforts!
From this incident, I have learned a truth: science is everywhere, as long as we observe carefully and pay attention to it, we can discover many things that we do not know through our own efforts. In addition, we must have the courage to practice, because if we only use our brains and do not use our hands, we will not be able to accomplish anything.
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Childhood, like a crooked river. There were a few waves churning in the creek. Sometimes the waves sing songs of joy, sometimes they pour out their troubles, sometimes they ......Among them, in that wave, something happened that I regretted.
That day, the math teacher said that there would be a mock test in a few days, and he asked us to go home and review well, so we didn't assign homework! When I got home, I threw away my schoolbag and thought: I've been nervously reviewing lately, how tired I am!
If I can relax, I might even be able to revive my brain! In the past few days, I haven't talked about reviewing mathematics, and I don't even touch the book cover, except for playing, or playing, and I have long left the mock exam out of the clouds!
On the day of the mock exam, the math teacher handed out the papers. My classmates said that this paper was a bit difficult, and I thought: Hmph!
What's so hard to do with me! Isn't it just those simple practical problems that come and go? I felt ridiculous when I watched my classmates meditate.
Look at their bear-like looks, I'm sure I'll be able to do it quickly and well! I looked at the paper, and it was pretty easy! After reading it, he buried his head in filling in the papers.
At first, I was confident because the first few questions were easy, but then I panicked. What to do? I remember the teacher talking about these kinds of topics.
I closed my eyes and tried my best to come up with an answer. But my mind was still blank. Alas!
I had to resign myself to fate! With my vague memory, I scribbled the answers, and then handed in the paper in frustration.
When I got home, I always felt nervous, and I always had those questions and ...... in my head
The next day, the math teacher was holding a stack of corrected test papers. The teacher's serious eyes seemed to tell me that I had done a bad job this time. The teacher started to hand out the curls, and I suddenly felt uneasy.
After sending out the curls, I carefully looked at the bright red "69", looked at the bright red ones, and a craze surged into my heart again......
I regret it very much! I can't forget the triumphant look I had before the exam; I can't forget the forgetfulness of the exam; I can't forget the panic when I handed in the papers! Why don't I review it well? Why do I always have to be so proud and confident?
There are often some casual little things in life that we need to pay attention to. If you don't think so, it will lead to regret and disappointment.
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