"Fresh air is a treasure" PPT

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"Fresh air is a treasure" PPT

Part One: Curriculum Exploration

If you were asked to choose a place to live, where would you choose? Why?

Exploration and communication - Is the air around me good?

Invite students to share their pre-class survey results within the group and fill in the survey results in the form above.

What should we pay attention to if we encounter weather with heavy air pollution?

The students observed carefully and were able to judge whether the air quality was good or bad, and they also knew what to do when encountering sudden heavy air pollution.

Fresh air is a treasure PPT, part two: discussion of issues

Survey Discussion – What pollutes the air

Invite students to share their pre-class survey results within the group and fill in the survey results in the form above.

What did you find through analyzing and communicating survey data?

Free time – what can I do?

Air is the external condition we rely on for survival. If the air is polluted, it will cause certain harm to our bodies. So, how do you plan to keep the air fresh?

Fresh air is a treasure PPT, the third part: popular science knowledge

The harm of air pollution to human body

After air pollution, there are three ways for human body to suffer damage, namely inhaling polluted air, surface skin contact with polluted air and eating food containing air pollutants. In addition to causing respiratory and pulmonary diseases, it can also cause harm to the cardiovascular system, liver, etc. In serious cases, it can kill people.

The harm of air pollution to human body

With the rapid development of modern industry and transportation, the emissions of smoke, dust and automobile exhaust have exceeded the self-purification limits of the atmosphere, and what follows is a very serious problem - air pollution. Pollutants that have a greater impact on air pollution include: sulfur oxides, nitrogen oxides, hydrocarbons, carbon oxides, dust, etc. Sulfur oxides are acidic substances that come from the combustion of sulfur-containing fuels (petroleum, coal), mainly sulfur dioxide and sulfur trioxide. Under certain conditions, they can form aerosols and acid rain that are extremely harmful to humans. Sulfur oxides not only pollute the environment, but also seriously endanger human health. They can irritate the human respiratory tract, narrow the inner diameter, increase resistance, reduce resistance to bacterial infections, damage bone marrow, spleen and other hematopoietic organs, and destroy metabolism in the body. .

Fresh air is a treasure PPT, part 4: Class summary

Through the study of this lesson, we know that protecting the environment means protecting our home, and purifying the air must start with small things around us.

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Update Time: 2024-11-22

This template belongs to Morality and the Rule of Law People's Education Edition Morality and Rule of Law 2nd Grade industry PPT template

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