"Achievements of Science and Technology" Science, Technology, Culture and Social Life PPT Courseware 3

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"Achievements of Science and Technology" Science, Technology, Culture and Social Life PPT Courseware 3

The successful development of "two bombs"

Discuss

1. Who is my country’s “two bombs hero”? What are the "two bombs"?

"Two bombs" refers to atomic bombs and missiles

2. Which country successfully manufactured the first atomic bomb?

contradiction?

3. What was the first military use of the atomic bomb?

The first atomic bomb exploded in the desert of New Mexico, USA

July 16, 1945

At about 8 a.m. on August 6, 1945, the United States sent two B-29 aircraft to Hiroshima, Japan, to drop an atomic bomb code-named "Little Boy". The bomb weighed about 4,100 kilograms and the explosive power was about 14,000 tons of TNT equivalent; August 9 At 10:30 a.m. on the same day, the United States sent another plane to drop an atomic bomb code-named "Fat Man" on Nagasaki, Japan. The bomb weighed about 4,500 kilograms, and the power of the explosion was estimated to be 20,000 tons of TNT equivalent.

4. What is the reason for China to develop the atomic bomb?

Purpose: Defense and defeat nuclear blackmail

Deng Jiaxian (1924.6.25 ~ 1986.7.29) was born in Huaining, Anhui Province, a theoretical physicist, a nuclear physicist, a member of the Chinese Academy of Sciences, and a member of the 12th Central Committee of the Communist Party of China.

In the research of atomic bombs and hydrogen bombs, he led the basic theoretical research on detonation physics, fluid mechanics, equation of state, neutron transport, etc., conducted a large number of simulation calculations and analyzes of the physical processes of atomic bombs, and took the lead in China's independent research on nuclear weapons. the first step. He also led the completion of the theoretical plan for the atomic bomb and participated in guiding the detonation simulation tests of nuclear tests. After the successful atomic bomb test, Deng Jiaxian immediately organized his forces to explore the design principles of the hydrogen bomb and select a technical approach.

He won the first prize of the National Natural Science Award in 1982, two special prizes of the National Science and Technology Progress Award in 1985, the title of National Model Worker in 1986, and one special prize of the National Science and Technology Progress Award in 1987 and 1989.

Deng Jiaxian is known as China's "two bombs hero."

Class summary

The successful development of "two bombs"

1. my country’s first atomic bomb test exploded successfully

2. my country’s first hydrogen bomb test exploded successfully

3. The success and development of my country’s missile and nuclear weapons development

4. The significance of my country’s successful development of nuclear weapons

aerospace technology

1. Research on missiles and nuclear weapons promotes the progress of aerospace technology and the development of the aerospace industry

2. The successful launch of my country’s first artificial earth satellite

3. Four successful launches of my country’s space test spacecraft

4. my country’s first manned space flight was a complete success and its significance

Hybrid rice technology

1. The first dwarf rice variety was successfully cultivated

2. Indica hybrid rice was successfully cultivated

3. The newly developed super hybrid rice was successfully tested in a small area

4. "Father of Hybrid Rice" Yuan Longping

“863” plan and the application of computer network technology

1. The proposal, implementation and results of the “863” plan

2. Application and promotion of computer network technology and its impact

Learning and inquiry

1. Understand high-tech achievements

2. Investigate the promotion of hybrid rice

Super hybrid rice: Super-high-yield rice breeding has been a key project of many countries and research units in the past 20 years.

Japan took the lead in carrying out ultra-high-yield rice breeding in 1981 and planned to increase rice yield by 50% within 15 years. The International Rice Research Institute launched a "super rice" breeding program in 1989, requiring the breeding of super rice with a yield 20% to 25% higher than the highest variety at the time by 2000. But their plans have yet to come to fruition.

The Ministry of Agriculture of my country established the China Super Rice Breeding Plan in 1996. The yield index of hybrid rice in one season is 700 kilograms per mu in the first period (1996-2000), and 800 kilograms per mu in the second period (2001-2005).

Learning assessment

1. In October 2003, my country’s manned spacecraft that successfully launched and returned to the ground was ( ).

A. Dongfanghong 1 B. Shenzhou C. Shenzhou 2 D. Shenzhou 5

2. Which of the following does not belong to the aerospace industry of New China ( ).

A. Atomic bomb explosion B. Artificial satellite C. Manned space flight D. Multiple satellites with one arrow

3. Our country is the first ( ) country in the world to successfully launch an artificial earth satellite.

A.3B.4C.5 D.6

4. The person known as the “Father of Hybrid Rice” is a Chinese scientist ( ).

A. Qian Xuesen B. Yuan Longping C. Deng Jiaxian D. Wang Daheng

5. Why does China, a peace-loving country, want to develop and master nuclear weapons?

A: China's development of nuclear weapons is not to carry out nuclear war, but to maintain world peace.

China develops and masters nuclear weapons in order to break the nuclear monopoly and nuclear blackmail of Western powers and eliminate nuclear weapons. China's possession of nuclear weapons is purely for defense and to protect the Chinese people from the threat of nuclear war. China will never be the first to use nuclear weapons at any time or under any circumstances.

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Update Time: 2024-07-02

This template belongs to History courseware Zhonghua Book Company Edition Eighth Grade History Volume 2 industry PPT template

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