A collection of small light bulbs for writing essays

1. Composition "I Make a Little Light Bulb" 400 Subs

Today's life is about innovation, and new inventions are constantly being created that change with each passing day, bringing convenience to our lives. I have loved science since I was a child and have an involuntary pursuit of inventions and experiments.

In a science class, the teacher said to us: "The electricity we use in our lives is provided by power sources, such as batteries, generators, etc. Only with flowing electricity can we light up Turn on the light bulbs and use various electrical appliances. When I got home, I suddenly became interested and opened my eyes. Is this difficult? . "The materials are very simple, a dry battery, a wire, and a small light bulb." The teacher said, "After you go home, follow the textbook and do the experiment on your own. Okay, class is over!"

Once Home, I picked up the small light bulb, read the book and said: "There are two connection points on the light bulb."

"The one with the copper cap on the battery side is the positive electrode, and the one made of zinc shell is the negative electrode."

"When doing experiments, the insulators at both ends of the wires should be removed."

Everything is ready and the work begins. I first carefully placed the small light bulb on the battery, but this light bulb seemed to be deliberately against me. It fell off when I put it on. This small light bulb must be a naughty bag known to everyone in the light bulb kingdom! So I ignored him for the time being. I first connected one end of the wire to the negative pole, and put the battery upright on the table with the negative pole facing down and holding it down with my hand. Then connect the other end of the wire to the positive terminal of the battery, and finally cross the connection point under the bulb with the positive terminal. Only two sounds of "Sisi" were heard, and the small light bulb turned on. The light bulb was like laughing out loud, and it was like a small yellow flower, lighting up.

This little light bulb is on, lighting up a bright path for my scientific mind. 2. Light up my little light bulb composition

The annual Science and Technology Festival is coming, and the school held a small science production activity. When the students heard the news of this activity, they were all happy and wanted to Take this opportunity to show off your talents.

And I am no exception. Even when I am eating, I am racking my brains to think of what small things to make? I looked up at a bright fluorescent lamp, and an idea suddenly popped into my mind: make a lamp. So, after coming home from school one day.

I found all the materials: a wire, a dry battery and a small light bulb. Without saying a word, I started working hard.

Failed once, came again, failed again, came again... Just like that, I tasted the taste of failure. But not to be outdone, I called in my father, who had been an electrician.

After listening to my father’s explanation, I realized that there was something wrong with the wiring of my small production. Because electricity flows from one end of the battery, through the light bulb, and back to the other end of the battery, forming a complete loop, the light bulb emits light.

But I missed the most important link. So the little light bulb doesn't light up.

After a little modification by me, the little light bulb miraculously lit up. I took the carefully crafted little science-made light bulb and looked left and right. I was afraid that something would go wrong, so I tried it again to make sure everything was fine.

Seeing the little light bulb light up in my hand again, I was filled with great pride. However, during the experiment, I also found that during the production process, to avoid battery short circuit, one end of the dry cell battery is a copper cap and the other end is a zinc shell.

A short circuit occurs when the two ends of a battery are directly connected together by a wire. When there is a short circuit, the battery and wires will become hot in an instant. Not only will the bulb not be able to emit light, but the battery will also break down quickly.

This Science and Technology Festival allowed me to learn more knowledge and understand more truths. People have to thank Edison, the great inventor, who invented the electric light and brought more convenience to people. It adds a necessity to life! Now, I also have my own "light"! I hope the next Science and Technology Festival will come soon. 3. A 405-word composition on making small light bulbs by hand

Today, I was bored at home and had nothing to do.

Suddenly my eyes lit up, why not do some crafts? Not only can it exercise our hands-on skills, it's also tons of fun! Today, I am going to make a "little light bulb". Haha, don’t mention it, hand-made is a lot of fun! I prepared a small light bulb and battery, and I was very happy to complete the process in one go. My father praised me, and the teacher praised me. The hard work paid off, and I finally knew how to install it.

It turns out that it is inserted, no wonder there is a small hole! Then it dawned on me. I continued to work patiently. When I encountered difficulties, I studied them carefully and eliminated them one by one. Finally, a helicopter finally appeared in front of me. Although it was not very beautifully done, it was done with my own heart.

Looking at the plane in front of me, I felt very happy. Haha, handmade is a lot of fun.

Remember, "what you see on paper is only shallow in the end. If you are aware of it, you must act on it."

4. Popular science composition about the small light bulb that turned on

Today, I finished my homework at home and was bored. I remembered the experiment introduced in the book and started doing it. I took out a small light bulb and a battery, and connected them with thin wires. The small bulb lit up, but it was not very bright. I had an idea and added another battery. Hey, it turned out a lot brighter. Encouraged, I added One battery after another was installed, and the small light bulb became brighter every time. Just when I was happy, the tungsten filament broke with a hiss. What's going on? I was puzzled, so I asked my dad. Dad said, "Just look at their casings and you will know." I quickly looked at the battery and saw that it said 1.5V. I looked at the light bulb again and it said 2.5V. Then I realized that the voltage that the small light bulb can withstand is 1.5V, and I just used five batteries, which is 7.5V, which is five times the voltage that it can withstand! Although the small light bulb was continuously overloaded, it still could not withstand the strong current. In the end, the tungsten filament was burned out. Ending———————————————————— —. At the end, the questioner should write it himself! Choose me. 5. Some pictures about protecting the environment, for writing essays

Protecting the environment is everyone’s responsibility! Start from me! The population on the earth is increasing, and humans must better protect the environment.

In this way, people can survive on the earth for a long time. However, with the increasing number of various types of factories, pollution has also followed. The pollution and waste gas emitted by factories are even more harmful to humans and the environment.

But some factory bosses, in order to make dirty money for themselves, ignore the health of others, which is really abominable! There are also those people who eat lunch and throw garbage after eating. There are also those who cut and fell randomly.

Please, all these shortcomings, must get rid of this immoral bad habit! Therefore, we must loudly call on all people in the world to start from small things, start from me, and start from now! Everyone must strictly and boldly supervise, and never be lenient when caught with heavy penalties! Especially the factory bosses! Protecting the environment is everyone’s responsibility! In this way, the environment can slowly return to the pollution-free, fresh air that can be touched everywhere. And it's so clear that you can see the colors of the stones at the bottom of the river at a glance.

You can see the beauty, flowers and trees everywhere! ah! People can return to the beautiful, pollution-free nature of the past. 6. An essay about making a small desk lamp

On my desk, there is a cute little desk lamp. It was given to me by my father on the day I entered school. At that time, he spoke to me sincerely Said: "Let it study with you in the future. I hope it will become your good partner." The small desk lamp has a unique shape, with a round bottom and a slender pole. The pole supports a blue round lampshade. There is a crystal lamp embedded below. When I turn on the desk lamp, the soft light immediately fills the desk, illuminating my books and the small bookstore at night. I can't put it down as soon as I see it. Whenever night comes, I I began to study intensely, with the small desk lamp shining brightly, standing by the table and quietly accompanying me. Sometimes, I would put a bouquet of spring wild flowers next to the desk lamp, and under the light, I would write in my diary. I wrote the motto "The plan for a year lies in spring"; sometimes, I would put a few autumn leaves on the lamp holder and recite the poem "Young people don't know how to study early, and they will regret studying late if they have gray hair". Year after year In 2006, the small desk lamp accompanied me through four springs, summers, autumns and winters, and we have become inseparable good friends. The light of the small desk lamp often encouraged me to overcome difficulties. Once, when I was studying, I encountered a very difficult Mathematical Olympiad question. I couldn't untie it, and I was so irritated that I stood up and turned off the light with a "pop". Suddenly the room was dark. The light of the small desk lamp disappeared, and my heart suddenly felt empty. In the darkness, I seemed to feel a small The desk lamp was criticizing me: "Little master, how can you give up so easily when you encounter a problem? Keep at it and you will succeed." I calmed down and turned on the desk lamp again, and the light shone on the book again. I changed the solution to the problem. My thoughts suddenly became enlightened, and I finally solved the problem. At that time, I really wanted to say to the small desk lamp: "My good partner." The small desk lamp has been used for a long time, and it also needs maintenance. Once, when I turned on the switch, the light It didn't light up. It turned out that the light tube was broken. I suddenly felt that I had lost this good friend and felt empty. My father ran around and visited several building materials cities before buying a new light tube. It seemed to be unique. . I turned on the switch, and my good friend came back! The light was softer and brighter, and the desk lamp began to accompany me to study again! The small desk lamp dedicated its light silently, and the light was as bright as white snow, illuminating my eyes. Books illuminate my desk and my path to study. They are my good friends and I will cherish them as always. I hope this little desk lamp can shine with its beautiful light forever.