The significance of the four major inventions, on the fifth grade winter vacation homework. Hurry!!

The significance of the four great inventions :

The four major inventions of the compass, papermaking, printing and gunpowder are the most brilliant technological achievements of ancient China, which have had an extremely far-reaching impact on promoting cultural exchanges and exchanges between peoples of all countries, promoting the rapid spread and increase of knowledge, and promoting the world's civilization and progress, and are the great contributions made by the people of Chinese to the development of science and technology in the world. In addition to the four major inventions, ancient China has also made remarkable achievements in other aspects of the field of technology, many of which have also had a worldwide impact, such as: mechanical technology, metallurgical technology, porcelain technology, textile and shipbuilding technology, water conservancy and construction technology, etc., in short, ancient China has made many world-famous achievements in the field of technology, made significant contributions to mankind, and left an extremely brilliant page in the history of science and technology in the world.

Sinan is the earliest of the four major inventions, invented and put into use in the Spring and Autumn Period, and then gradually spread to all over the world, playing an important role in modern human geography, navigation, military and other aspects, is the prototype of the compass;

Before the invention of papermaking, people used bamboo to write, which consumed raw materials and occupied space, after Cai Lun of the Eastern Han Dynasty improved "Caihou paper", this problem was solved, and it was more convenient for people to write at a low cost, and more works were preserved, which we would always use in our daily life;

Gunpowder is the result of the ancient people's desire to become immortals and actively alchemy, and was used in the military in the Tang Dynasty and became an indispensable ingredient in modern, aerospace and architectural design;

Trap printing: Invented by Bi Sheng in the Northern Song Dynasty, it greatly saves raw materials and can be reused, which is the prototype of modern printers.

In general, it promotes the development of society.

Hope it helps.

It has promoted cultural exchanges and exchanges between the peoples of various countries, promoted the rapid spread and increase of knowledge, promoted the civilization and progress of the world, and made great contributions to the development of science and technology in the world by the Chinese people, which has left an extremely brilliant page in the history of science and technology in the world and has had an extremely far-reaching impact on the world.

Answer: The four major inventions have had an extremely far-reaching impact on promoting cultural exchanges and exchanges between people of all countries, promoting the rapid dissemination and increase of knowledge, and promoting the civilization and progress of the world.

I give you the answers to the multiple-choice and true/false questions.

2st: three, five, c a c a a a a b a b

3rd: i. d c a g e b f

4th: Fourth

5th: II. c c c d

6th: 3. d d b d a c c c7th: 4. b d a b a

8th: iv. c c a b c b

9th: II. d a b c b d