"We need fresh air" PPT courseware

Description

"We need fresh air" PPT courseware

Please select your preferred living environment

If you were asked to choose one of the following two environments as a place to live, which one would you choose?

After thinking about it, please choose

Tell us your answer and why you chose it. Or give a reason why you didn't choose it.

What do we want?

Fresh air makes us feel comfortable.

What does burning bring us?

In our daily production and life, we need to use a large amount of various fuels as energy. So in addition to releasing energy when the fuel is burned, what else does it bring to us?

experiment:

Purpose of the experiment: to observe what happens when a candle burns.

Experimental equipment: candles, asbestos nets, matches, alcohol lamps.

Experimental steps: Light the candle, place a clean asbestos net over the flame, and observe the phenomenon.

Experimental phenomenon: The asbestos net is blackened and heated.

Experimental conclusion: When a candle burns, it emits heat and produces black smoke.

Experiment summary:

Most of the fuels used by humans produce smoke when burned, and these smoke are the main culprits of air pollution. Coal, wood, and petroleum products are all sources of pollution.

We also found that when the fuel is completely burned, less smoke and dust are produced; otherwise, the smoke and dust are larger. Therefore, we can use blowers in our lives to accelerate combustion, which can reduce pollution.

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For more information about the "We Need Fresh Air" PPT courseware, please click the We Need Fresh Air PPT tab.

"We need fresh air" PPT courseware 3:

"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..

"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..

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Update Time: 2024-11-22

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

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