"Development and Utilization of Energy" Chemistry and Life PPT Courseware

Description

"Development and Utilization of Energy" Chemistry and Life PPT Courseware

learning target:

1. Learn what energy is and be able to distinguish between renewable energy and non-renewable resources.

2. Know that energy is closely related to human survival and social development. Knowing the history of human discovery, development, and utilization of energy is the history of understanding and understanding nature, and being able to explain it through specific examples.

Self-study guide:

1. Please see textbook P198-P200.

2. Analyze the following questions:

(1) What is energy, and what are its categories?

(2) How to view the use of energy and environmental protection.

1. Natural energy

1. Classification of energy 1

Primary energy is classified according to whether it can be obtained directly from nature. Secondary energy

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

Coal, oil, natural gas, electric energy, alcohol, etc.

Solar energy, wind energy,

Hydro energy, geothermal energy,

Nuclear energy, tidal energy, etc.

2. Current energy usage

More than 90% of world energy consumption is now non-renewable energy

Use more oil than coal and more coal than natural gas

3. my country’s current energy consumption structure is very unreasonable.

Coal accounts for 75% of energy use, far more than oil and natural gas, and the proportion of non-renewable energy used is too large.

Hydropower and coal resources are abundant, but oil resources are in short supply.

The extensive use of coal has caused serious environmental pollution.

2. Development and utilization of energy

1. The development and utilization of energy is the history of human understanding and understanding of nature.

2. The three energy revolutions have promoted the development of human history.

second energy revolution

The mining of coal provided the basis for the creation of the steam engine and brought about the first industrial revolution in human history. The successive inventions of various machines and means of transportation have greatly improved social productivity. The main energy source of mankind has gradually transformed into energy sources such as oil and natural gas. Humanity discovered electrical energy through electromagnetic research.

3. The core of energy utilization is to improve energy utilization efficiency

Energy utilization rate is the ratio of the energy effectively used in energy utilization to the energy contained in the energy consumed.

Improving energy utilization can save energy and reduce environmental pollution when using energy, which has high economic significance and environmental benefits.

Developing new energy sources is also an important measure to save energy.

3. Energy and environment

1. Impact of energy development and utilization on the environment

The development and utilization of energy create conditions for the development of human society, but also cause environmental pollution and ecological damage.

The burning of coal will produce a large amount of CO2 and smoke, polluting the air. The increase in CO2 concentration in the atmosphere leads to the greenhouse effect, global warming, and harms ecological balance.

The "waste heat" generated by thermal power plants can cause thermal pollution.

Spilled oil can pollute the ocean.

Vehicle exhaust and various industrial waste gases pollute cities and endanger people's health.

Human beings and nature interact with each other and form a unity of opposites. Transitional demands and destruction of nature lead to nature's "punishment" on humans. This is a dialectical relationship of cause and effect, a unity of opposites.

Energy and environment are today's challenging topics, and handling the relationship between them well is a requirement of the scientific outlook on development. We must develop and utilize energy rationally.

2. The development direction of future energy

The world's population is increasing rapidly, energy consumption continues to grow, and environmental problems are becoming increasingly serious and attracting increasing attention.

Therefore, the future development direction of energy:

First, the quantity is abundant enough to ensure long-term use;

Second, the price is cheap enough to ensure that most people can afford it;

Third, the relevant technology must be mature enough to ensure large-scale use;

Fourth, it must be safe and clean enough to ensure that it will not seriously affect the environment.

Summary of this section

Energy is divided into renewable energy and non-renewable energy. The energy we currently use on a large scale is mainly non-renewable energy. Therefore energy must be conserved.

The development and utilization of energy is the history of human understanding and understanding of nature. Drilling wood to make fire → the use of coal → the use of steam engines leading to the first industrial revolution → the use of electricity → new energy represented by nuclear energy

The development and utilization of energy promotes social development, but also brings environmental pollution and ecological damage. Energy must be used rationally and the environment protected. This requires the development of new energy sources.

practise

1. ______ energy, ______ energy, and ______ energy are renewable energy sources, while ______, ______, ______, and ______ are non-renewable energy sources.

2. Frenchman Guignaud built the world's first steam-driven tricycle in 1769. The cartoon you see now is said to be the schematic diagram of a steam car designed by Newton.

(1) What forms of energy are involved in this schematic diagram? Please briefly describe the corresponding energy conversion process.

Chemical energy, internal energy, mechanical energy; fuel combustion: chemical energy is converted into internal energy; the progress of the car: the internal energy of water vapor is converted into the mechanical energy of the car.

(2) How is the force that causes the car to move forward generated? Who is the object exerting this force?

The effects of force are mutual. The steam ejected backwards in turn gives the car a forward thrust. The ejected steam is the force-exerting object.

3. While energy contributes to the development of human civilization, it also brings ________ to mankind. The burning of large amounts of fossil fuels is responsible for ___________, _______, ___________, etc.

4. Among the following energy sources, the ones that are renewable energy sources are[ ]

A． Petroleum b. Water energy c. natural gas d. coal

5. The energy used in modern society, especially in our country, mainly comes from [ ]

A． Solar energy b. Wind energy c. Water energy D． Internal energy gained from burning fuel

6. Among the following measures, those that aggravate the greenhouse effect are[ ]

A． Plant a large number of trees B. Control the use of coal, oil and natural gas

C. Vigorously develop nuclear energy, solar energy and wind energy D. heavy use of fossil fuels

7． The widespread use of electric motors, telephones, radio communications, etc. is primarily due to the mass production of which of the following energy sources? [ ]

A． Internal energy b. Electric energy c. Nuclear energy D. Fossil Energy

Keywords: Chemistry and Life Teaching Courseware, Energy Development and Utilization Teaching Courseware, Hunan Education Edition Ninth Grade Chemistry PPT Courseware Download Volume 2, Ninth Grade Chemistry Slide Courseware Download, Chemistry and Life PPT Courseware Download, Energy Development and Utilization PPT Courseware download, .PPT format;

For more information about the PPT courseware "Chemistry and the Development and Utilization of Energy in Life", please click the "Development and Utilization of Energy in Chemistry and Life ppt" ppt tab.

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Update Time: 2024-07-28

This template belongs to Chemistry courseware Hunan Education Edition Ninth Grade Chemistry Volume 2 industry PPT template

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