Category	Format	Size
Hunan Education Edition Third Grade Science Volume 1	pptx	6 MB

"Dust in the Air" Air PPT Courseware

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Upload Time: 2024-10-01

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Description

"Dust in the Air" Air PPT Courseware

take a look

What's in the air?

Is there anything floating in the light you see?

Where does this dust come from?

What other things escaped into the air?

think about it

How can we know how much dust is in the air in a certain place?

Compare

There is more or less dust in the air at different locations in the school.

Dust in the air is always harmful to us.

Dust is the enemy of human health, so people especially hate it. Dust carries many bacteria, viruses and insect eggs flying everywhere, spreading diseases. Industrial dust and fiber dust can cause workers to suffer from various occupational diseases that are difficult to cure. Excessive dust can also cause environmental pollution, affect people's normal life and work, and induce respiratory diseases in humans...

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For more information about the "Dust in the Air" PPT courseware, please click the "Air ppt Dust in the Air ppt" tag.

File Info

Update Time: 2024-10-01

This template belongs to science courseware Hunan Education Edition Third Grade Science Volume 1 industry PPT template

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Air ppt Dust in the air ppt

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"Dust in the Air" Air PPT Courseware