"We need fresh air" PPT courseware 3

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"We need fresh air" PPT courseware 3

Experiment: What happens when fuel burns?

(1) How do you plan to conduct experimental research?

(2) What materials are needed in the experiment?

(3) What should we pay attention to during the experiment?

Please note!

(1) Properly adjust the asbestos net and place it at the candle flame position.

(2) Carefully observe the changes on the asbestos net and fill in the experimental report form carefully.

(3) After the observation, put away the experimental items and think about the questions below the report sheet.

Observe and think

(1) What phenomena did you observe during the experiment? What causes this? What does it mean?

(2) What will happen if it is a fuel lamp?

(3) If it is not blocked by asbestos nets, where will the black smoke go?

(4) Where else in life does this phenomenon occur?

It is understood that the World Health Organization has listed indoor air pollution as the first among 18 types of carcinogens. The Lanzhou Indoor Pollutant Detection and Control Center also stated that home decoration, smoking, dust under the bed and bedding, and air conditioners are all major sources of indoor pollution.

According to a set of data from the World Health Organization, 24 million deaths worldwide every year are closely related to indoor PM2.5, and 110,000 people die in my country every year. In addition to pollution caused by excessive decoration and improper decoration, there is also pollution from other sources. Certain compounds excreted through breathing and sweat in the office, viruses expelled by coughing and sneezing, and pollutants such as smoke produced by smoking are all very harmful to human health.

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"We need fresh air" PPT courseware 2:

"We need fresh air" PPT courseware 2 Tips: Students in the group exchange the collected information together. Fully express your opinions and ideas. While communicating, choose one student from each group to take notes carefully. The main pollution sources and pollutants of the atmosphere Sources of air pollution..

"We need fresh air" PPT courseware:

"We need fresh air" PPT courseware Please choose the living environment you like. If you were asked to choose one of the following two environments as your place to live, which one would you choose? After thinking about it, please choose to talk about your answer and explain the reason for your choice...

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Update Time: 2024-09-09

This template belongs to science courseware E-education edition fifth grade science volume 2 industry PPT template

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