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

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

Materials we know

Common ones include metal, wood, plastic, glass, paper, fiber, etc. Do we know their properties? Try to describe each of them with appropriate words.

Natural materials: as opposed to artificial materials. It refers to materials that are already available in nature and can be used directly without processing or basically without processing.

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

Artificial materials: relative to natural materials. Materials that cannot be used directly, or do not exist in nature, 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.

Do it

1. Judgment question.

(1) Many objects are not made of a single material, mainly for aesthetic reasons. ( )

(2) Among the materials we use, some are natural materials and some are man-made materials. ( )

(3) Plastics and ceramics are natural materials. ( )

(4) Most of the items around us are made of plastic, so plastic is the best material. ( )

2. Multiple choice questions.

(1) Which of the following materials has the highest hardness ( ).

A brick B iron C plastic D wood

(2) To build an airplane, ( ) is more commonly used.

ANatural material BComposite material CSingle material

(3) The following materials are most likely to be scratched by nails ( ).

A brick B ceramic C plastic

(4) A small solid square made of the following materials will sink when placed in water ( ).

A wood B plastic C iron

(5) Which of the following materials has the best water absorption ( )

A brick B wood C plastic

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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 3:

"Classification of Materials Around Us" Materials Around Us PPT Courseware 3 Materials and Environment Natural materials: refer to materials that are already available in nature and can be used directly without processing or basically without processing. Such as cotton, sand, stone, silk, coal, oil, iron ore, flax...

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Update Time: 2024-06-28

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

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