"Chemistry and Environmental Protection" Chemistry and Social Development PPT download

Description

"Chemistry and Environmental Protection" Chemistry and Social Development PPT download, 23 pages in total.

Knowledge review

Knowledge point 1: Protect the source of life

1. Water pollution mainly comes from __________, __________ and _____________.

2. The dangers of water pollution

(1) Destroy water_____________;

(2) Affecting industry, agriculture and _________ production;

(3) Threaten human health and life safety.

3. Treatment and prevention of water pollution

(1) Use ____________ to treat sewage;

(2) Comprehensive prevention and control of water pollution:

a.____________________: Research chemical reactions and processes, realize pollution-free production of chemical products, develop phosphorus-free detergents, etc.

b.____________________: Research high-efficiency, low-consumption sewage treatment technology and conduct comprehensive treatment of sewage.

c.____________________: Develop pollution-free fertilizers and pesticides.

Example analysis

►Type 1 Water pollution and treatment

Proposition perspective: Examine students’ understanding of water pollution and its prevention and control

Example 1 The main causes of water pollution are ( )

① Random discharge of industrial waste gas, waste residue and waste liquid

②Improper use of chemical fertilizers and pesticides in agricultural production

③Long-term contact of natural water with air, rocks and soil

④ Massive discharge of urban domestic sewage

A, ①② B, ②③ C, ①②④ D, ①③④

[Variation question] Use straight lines to connect the sources of the following water pollutants and their examples

Sources of water pollutants Examples of water pollution

aIndustrial pollution ①Irrational use of chemical fertilizers and pesticides

b Agricultural pollution ② Discharge sewage directly after washing with phosphorus-containing laundry detergent

c Domestic pollution ③ Waste residue from the metallurgical industry

d Radioactive contamination ④ Nuclear waste is thrown into the deep sea

►Type 2 Air pollution and control

Proposition perspective: Examine students’ understanding of air pollution and its prevention and control

Example 2 Acid rain is one of the obvious manifestations of serious air pollution. The main substance that forms acid rain is ( )

A. Methane and carbon monoxide

B. Sulfur dioxide and carbon monoxide

C． carbon monoxide and carbon dioxide

D． Sulfur dioxide and nitrogen dioxide

Keywords: free download of PPT courseware for the ninth grade of the May 4th Lujiao edition of Chemistry, Chemistry and Environmental Protection PPT download, Chemistry and Social Development PPT download, .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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Update Time: 2024-10-05

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

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