"Energy" Energy and Sustainable Development PPT download

Description

"Energy" Energy and Sustainable Development PPT download

Part One: Learning Objectives

1. Understand what energy is.

2. Understand what primary energy and secondary energy are.

3. Understand the energy trends of the 21st century.

Learning points

Distinguish between primary energy and secondary energy.

Energy PPT, Part 2: Preview before class

1. Coal, oil, and natural gas were formed by animals and plants buried underground millions of years ago over a long period of geological time. They are called __________.

2. Energy that can be obtained directly from nature is called __________. Energy that cannot be obtained directly from nature and must be obtained by consuming primary energy is called __________.

3． The reserves of fossil energy are limited and non-renewable, and will be exhausted in the future. ______________ is an important issue on a global scale.

Energy PPT, Part 3: Classroom Introduction

1. The history of human energy utilization

Read the content on P166~P167 of the textbook and learn relevant knowledge. Answer the following questions.

1. What is the significance of drilling wood to make fire in the history of human energy utilization?

Drilling wood to make fire enabled mankind to realize the transition from using natural fire to using artificial fire. It ended the era of humans eating hair and drinking blood, and opened the era of humans using firewood as the main energy source.

2. How is energy converted during the operation of a steam engine? What significance does the invention of the steam engine have in the history of human energy utilization?

The working process of a steam engine is to convert the internal energy obtained by combustion into mechanical energy. The invention of the steam engine was a new milestone in mankind's use of energy, realizing the large-scale replacement of human and animal power with mechanical power. The main energy source of mankind has shifted from firewood to coal.

3． What is fossil energy? What are primary energy sources?

Summary: ______, ________, and __________ are collectively referred to as fossil energy;

Primary energy sources include: __________, __________, __________, ___________, _______, etc.;

Secondary energy sources include: ________, etc.

2. Energy trends in the 21st century

Read the contents of textbook P167~P168, learn relevant knowledge, and answer the following questions.

1. As the main energy source in today’s world, is fossil energy inexhaustible?

Fossil energy reserves are not abundant, and fossil energy cannot be regenerated after development and utilization. If it is exploited on a large scale for a long time, it will be exhausted in the near future.

2. What are the disadvantages of using fossil energy?

The process of mining fossil energy will cause damage to the environment, and the use of fossil energy will cause air pollution.

3． How to solve energy problems?

On the basis of saving existing energy, develop new energy and rationally utilize known energy.

Conclusion: The speed of energy consumption is rapidly ________, and mankind will face an energy crisis.

Energy PPT, Part 4: After-class practice

1. Which of the following substances is energy ()

A. Iron block B. Granite c. sun d. desert sand

2. Among the following energy sources, which one is a secondary energy source ()

A. Coal b. Electric energy

C. Solar energy D. oil

3． Among the following energy sources, the one that belongs to fossil energy is ()

A. Nuclear energy, biomass energy, hydro energy

B． Electric energy, gasoline, diesel

C. Solar energy, geothermal energy, wind energy

D． Coal, oil, natural gas

4. Which of the following statements about energy is incorrect ()

A. For ancient humans, there was a lot of energy available to them

B． The invention of the steam engine brought mankind into industrialized society

C. Fossil energy is the main energy source in the world today

D． Nuclear energy has become an energy source for many economically developed countries

5. The largest proportion of energy currently used in China is ()

A. Water energy and geothermal energy B. coal and oil

C. Nuclear energy and tidal energy D. solar energy

6. The high-speed train EMU uses the power provided by the electric motor on the vehicle when traveling at high speed. The power supply can be stopped before arriving at the station, and the vehicle speed is reduced from 200 km/h to 90 km/h. During this period, the vehicle's inertia is used to move forward, and the coils in the magnetic field follow the wheels. Rotating together produces an induced current, and mechanical braking is performed below 90 km/h, which can not only reduce mechanical wear but also save energy. The energy conversion not involved in the whole process is ()

A. Convert electrical energy into mechanical energy B. Conversion of mechanical energy into electrical energy

C. Mechanical energy is converted into internal energy D. Internal energy converted into mechanical energy

7. Travel is an indispensable part of people's work and life. There are various tools for traveling and the energy used is also different. The types of energy consumed by bicycles, solar cars and electric locomotives are ()

①Bioenergy ②Nuclear energy

③Electric energy ④Solar energy ⑤Chemical energy

A. ①③⑤ B． ①④③

C. ①②③ D. ①③④

8. Energy issues are one of the three basic elements of the development of modern society. The energy family includes: ① firewood; ② coal; ③ petroleum; ④ natural gas; ⑤ water energy; ⑥ wind energy; ⑦ solar energy; ⑧ geothermal energy, etc. When a large amount of various energy sources are consumed, air pollution will be caused by __________; soil erosion and desertification will be caused by ______. (Fill in the serial number in the question)

9. Read the following material and answer questions.

Coal is not only an important energy source, but also a very important organic chemical raw material.

Among the "Three Coal Brothers", anthracite coal has the highest degree of deterioration. It has the highest calorific value, strong firepower, little smoke, and little ash after burning. It is a good fuel. Although the degree of deterioration of bituminous coal is worse than that of anthracite and its heat generation is moderate, it is the most promising of the three brothers. It can not only be used to smelt steel, but can also be vaporized and liquefied for use in many aspects of production and life; lignite has the worst degree of deterioration. , has the lowest calorific value, but is a good chemical raw material.

Put the coal into the coke oven, isolate it from the air, and heat it to about 1000°C to obtain products such as coke, coal tar, and coke oven gas. Coke can be used to produce gas, electrodes, synthetic ammonia, calcium carbide, etc. Coke oven gas is a gaseous fuel and chemical raw material. Coal tar is the "raw material warehouse" for the manufacture of dyes, spices, synthetic rubber, plastics, synthetic fibers, pesticides, fertilizers, explosives, detergents, herbicides, solvents, asphalt, paint, saccharin, sanitary pellets, etc.

(1) According to the degree of metamorphism of coal during its formation, coal can be divided into __________, ________ and ________. Among them, __________ is the best fuel.

(2) The products of coal coking are __________, __________ and __________, which are all important chemical raw materials. Coal gas is produced from __________ and is a secondary energy source.

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For more information about the "Energy and Sustainable Development Energy" PPT courseware, please click the Energy and Sustainable Development ppt Energy ppt tag.

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Update Time: 2024-08-02

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