"Classifying the Materials Around Us" Materials Around Us PPT Courseware 3

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"Classifying the Materials Around Us" Materials Around Us PPT Courseware 3

Materials and environment

Natural materials: refers to materials that are already available in nature and can be used directly without processing or basically no processing.

Such as cotton, sand, stone, silk, coal, oil, iron ore, flax, wool, leather, clay, graphite, etc.

Artificial materials: materials that cannot be used directly, or do not exist in nature, and need to be artificially processed or synthesized before they can be used.

For example, steel materials are extracted from iron ore, and glass is mainly processed from silicate minerals. Plastics are mainly extracted from petroleum, coal, and natural gas.

Material recycling

Some materials can be recycled, but some materials cannot. Before class, students collected information about reusable materials and shared them with the whole class!

Reusable materials can greatly save resources and reduce environmental pollution caused by waste. When the functions are similar, we should promote the use of reusable materials or items made of these materials.

How should we use materials rationally and reduce damage to the environment?

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"Classifying the Materials Around Us" Materials around us PPT:

"Classifying the Materials Around Us" Materials Around Us PPT Part One Content: Classifying Them Based on the knowledge learned previously, take a look at what materials the items in the picture below are made of? Classify these items according to the materials used, writing at least...

"Classifying the Materials Around Us" Materials Around Us PPT Courseware 4:

"Classifying Materials Around Us" Materials Around Us PPT Courseware 4 Natural Materials: Materials that come directly from nature are called natural materials! Man-made materials: Some materials do not come from nature, but are processed natural materials, or the properties of natural materials are changed.

"Classifying the Materials Around Us" Materials Around Us PPT Courseware 2:

"Classifying Materials Around Us" Materials Around Us PPT Courseware 2 Some of the materials we use are natural materials, such as wood, clay, cotton, leather, etc. We can use these materials directly and make corresponding items according to their respective characteristics. Some are people...

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Update Time: 2024-10-02

This template belongs to science courseware Third Grade Science Volume 1, Textbook Edition industry PPT template

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