I love science composition 500 words

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[Part 1]

I get very excited when it comes to doing scientific experiments, because it is not only fun, but also gives me insights. Recently, the classmates in the class were doing the experiment of lighting up small light bulbs. I was very curious and prepared to do this experiment.

I first bought back a few AA batteries with my mother, then took out the wire, pressed the negative electrode of the battery on one end of the wire, and then placed a small light bulb vertically on the positive electrode of the battery, which is the protruding part. Everything was ready. Finally, I picked up the other end of the wire and carefully touched the small light bulb. The small light bulb lit up, and the experiment was successful. I was immediately happy. Great, I shouted "I succeeded!"

In order to make the small light bulb brighter, I used two batteries, which were a little brighter than last time. In order to make it brighter, I tried to use four batteries. When I placed one battery and then put the second battery, it fell over. I failed. If they were all closed on the table and the batteries were rolling around, it still didn't work. I failed again. The battery can't be fixed at all. I've tried every method but it doesn't work. What should I do? Just when I didn't know what to do, I remembered the flashlight I played with when I was a child. By the way, I can also imitate the flashlight and make a shell. I first took out a piece of paper, wrapped all four batteries, put transparent tape on the outside of the paper, and arranged them one by one in the same order as before. The small light bulb turned on, and the light was much brighter than the previous times. I was ecstatic, and there was an indescribable joy in my heart.

But why does the little light bulb light up? I felt very strange, so I searched for information on the Internet and found that it was because the current passed through the filament and friction generated heat. The heat was converted into internal energy, and the internal energy was converted into light energy. Light was emitted, and the small bulb became brighter.

I didn’t expect that science is so magical and scientific experiments are so interesting. I love doing scientific experiments and I love science!

[Part 2]

Everyone has something they like to do. Some people like to experiment, and some people like to write. . . . . So, you know what I like? You don’t know, then let me tell you quietly, my favorite is science. Without science, people would not think much about a lot of things and create a lot of things. I have always felt that this sentence makes sense.

One time, my mother called me to ask my father to pour the tea and water that my father drank. I took the quilt from my mother and ran to pour it. Suddenly, someone called me and it turned out that it was my younger brother who came to play with me. I ran to play with my brother before I had time to pour out the tea and water. While my brother was playing, he put a nail in the cup, and I didn’t do much. Care. While we were playing, it was getting late and my brother had gone home. I also took a shower and got ready to go to bed.

A few days later, my brother came to our house to play again. When my mother went down to wait for them, she suddenly found that the cup from last time had not been taken up and was placed underneath. She reached for it and just picked up the quilt and looked at it before shouting: "Sun Cong, come here." "I happily ran to my mother. My mother raised the quilt in front of my eyes and asked me: "What's going on? Why didn't you pour out the water in this quilt, and why is there a liquid like ink in it. "I shook my head and did not answer. There were little questions in my mind, how could the good tea water turn into ink?

A few days later, I suddenly remembered that my brother put an iron nail inside the quilt when he came to our house to play a few days ago. Thinking of that, I started to do the experiment. I hurried downstairs to get an iron nail, put it in a bottle filled with tea water, and put it there the next day. When I came home at noon, I saw that the original green tea water had turned into a color like ink. I was confused, so I started to look up information. After searching for a while, I couldn't find it in the book. I was about to check it on the Internet. At this time, my mother came over and said to me with a smile: "The tea water contains a five-finger called tannic acid. When it encounters iron objects such as iron nails, a chemical reaction will occur. When the two combine, it will turn into a black liquid." ”

Oh! So that’s it. Mom’s explanation answered all my questions.

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