"Chemistry and Environmental Protection" Chemistry and Social Development PPT teaching courseware

Description

"Chemistry and Environmental Protection" Chemistry and Social Development PPT teaching courseware, 27 pages in total.

learning target

1. Know the main causes of water and air pollution, major pollutants and their hazards, and understand the general principles and methods of preventing and controlling water and air pollution;

2. Understand the causes of acid rain, the main acid rain distribution areas in my country, and the main measures to prevent and control acid rain;

3. Understand the core and goals of "green chemistry".

1. Protect the Source of Life

Water pollution mainly comes from industrial wastewater, agricultural water and domestic sewage.

Dangers of water pollution

(1) Destroy the water ecosystem;

(2) Affect industrial, agricultural and fishery production;

(3) Threaten human health and life safety.

Activity exploration: chemical treatment of sewage

(1) Take a cup of sewage, observe the color, and measure the pH;

(2) Adjust the sewage to neutrality;

(3) Add alum to the sewage until it dissolves, let it stand, and observe;

(4) Pour the above sewage into the purification device as shown in the picture, filter it, add bleaching powder, stir and observe;

(5) Discuss the general steps of sewage treatment.

2. Return clean air to humans

Air pollution: The concentration of various pollutants emitted into the atmosphere due to human production and life exceeds the limit allowed by the environment, thereby causing harm and impact to the survival of living things, human health, and normal industrial and agricultural production.

Acid rain hazards:

1. Cause the death of fish and affect the growth and reproduction of aquatic organisms;

2. Acidify the soil and destroy the growth of crops and forests;

3. Cause corrosion and damage to bridges, works of art, buildings, machines, etc.;

4. Endanger human health.

Knowledge training

1. Nowadays, people are paying more and more attention to air pollution. Which of the following situations will not cause air pollution ( )

A. Using hydrogen as fuel B. Burning garbage in the open C. Car exhaust emissions D. Fireworks and firecrackers set off during festivals

2. Which of the following phenomena has nothing to do with environmental pollution ( )

A. tide b. greenhouse effect

C． Acid rain d. ozone hole

Keywords: Free download of PPT courseware for the ninth grade of the May 4th Lujiao version of chemistry, PPT download of chemistry and environmental protection, PPT download of chemistry and social development, .PPT format;

For more information about the "Chemistry and Social Development Chemistry and Environmental Protection" PPT courseware, please click the Chemistry and Social Development PPT Chemistry and Environmental Protection PPT tab.

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File Info

Update Time: 2024-09-07

This template belongs to Chemistry courseware Lu Jiao Edition Ninth Grade Chemistry Volume 2 industry PPT template

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