What is a science and technology expository essay?

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Analysis: Science and technology description small**.

It refers to a type of small ** in which the author explains and explains a natural phenomenon or natural thing by using detailed and reliable information. Generally speaking, it does not directly use observation, experiments, investigations and other research methods, but mainly obtains rich second-hand materials from books and periodicals, teachers and other places, and through its own comprehensive analysis and logical reasoning, it uses its own understanding language to explain a certain point of view.

Although this kind of article does not have the arguments obtained from the personal practice of the first three categories, it is, after all, through the author's careful collection and sorting of data, comprehensive analysis and put forward new points of view and new insights, so it is also recognized by Yamae that it is a scientific small **. In particular, it is reminded that writing a scientific explanation is that you must not rush to check the information after raising a question, and then copy and explain it without analysis, so that there is no new idea, and the article without new insights can only be regarded as a general popular science article, which cannot be called a scientific small **, and can not cultivate your ability to study the problem.

Everyone often sees the figure of composition, especially the highly organized expository essay, which is a style of writing that objectively explains things or clarifies the reasoning. How do you write this type of essay? The following is a scientific expository text that I have carefully put together and you are welcome to share.

Science is the driving force behind the development of the world and can make you more valuable.

The first industrial revolution was the age of steam, and this industrial revolution was when Britain became the most powerful country in the world. Because, this country was the first to master the technology. The second industrial revolution, this is the era of technological development, Britain declined, the United States rose, because it was the first to grasp, it can be seen, is the driving force for the development of this world, without development, we are just a group of uncivilized apes.

No, half of the population in our country can't eat enough, because of it, Yuan Longping cultivated hybrid rice, and the 1.3 billion people have solved the problem of food and clothing. Yuan Longping, he used to create an impossible miracle. It is power, Archimedes also mastered, he once said, give me a fulcrum, I can pry the whole earth.

At the time of World War II, the Nazis collected **, a family mastered, and he protected the medals he received. Here's the thing, Bohr is a famous man, in order to keep his medal, he used the knowledge he reacted with the medal and aqua regia, and finally turned into a lump of liquid, he put this bottle of liquid in a glass bottle, put the solution bottle on the laboratory shelf, the Nazi soldiers who came to search searched the whole room, they saw only the solution in the glass bottle, no gold or silver, so they didn't find this ** medal. Later, when the fascists were defeated, he also used his knowledge, he used the principle of redox reaction, separated gold and silver, and received a new medal.

Qian Xuesen has mastered it, so his status in the United States or China is the top priority. He was the father of the two bombs of our country, and he was a great man. He studied abroad in his early years, and after completing his studies, he wanted to return to his homeland and work hard for the prosperity of his motherland.

But he was obstructed by the United States in every way. U.S. Navy Undersecretary Kimpel was one of those who prevented him from returning to his homeland, saying in a telegram to USCIS: "I'd rather shoot this guy than let him leave the United States."

He knows too much about the circumstances that are so precious to us that he is worth five divisions wherever he is! "Because, Qian Xuesen, he, he has mastered, the Americans can't let such a powerful force fall into the hands of China, so the United States wants to eliminate this powerful force before it is formed. And with the efforts of our China, Qian Xuesen, this great family, finally returned to our motherland and led our country to become stronger.

Yes, make him worthy.

Mastering science can make us understand a lot and make our lives more valuable.

My name is water, which is made up of two hydrogen atoms and one oxygen atom, and is an indispensable friend of mankind.

There are my footprints in every place on the earth. I can provide benefits to people, but I can also bring disasters. If you can master my temper, I will serve you very well and get along with each other.

For example, I can gather rivers to generate electricity for people, I can irrigate farmland for farmers, I can carry ships, freighters, and things that spice up the world. If people don't see me for a long time, they will look for me in every possible way because they need me so much. I like laborers and newborns, and I often wash away the dirt of the day for laborers; Sprinkle a drop of cold water on your newborn and tell him to live a long life.

If, you can't get hold of me, "Hehe! I've got a temper! "For example, I'm going to go crazy and break down the levees and flood the whole city, causing a huge disaster for humanity.

I am also varied, turning into hailstones that pierce every house; It turned into a downpour, flooding the farmland; It becomes a thick cloud, obscuring the dazzling sun, and it does not see the light for a long time.

Now, with the development of science and technology, human beings use me as fuel, instead of energy, to reduce oil, "Hehe! I'm also in the fashion zone! ”；People also sprinkle me on big trees and flowers to moisten them and make them more vigorous.

From the above examples, you know my character too! I am willing to teach friends with human beings, and I am willing to serve you better.