"Various Materials" Air PPT Courseware

Description

"Various Materials" Air PPT Courseware

Various materials

Can you find other objects?

The objects around us are made of various materials.

What materials are these objects made of?

Metal, wood, plastic, glass, paper, fiber...

Metal

It has unique luster and opaqueness, and is rich in malleability, ductility, thermal conductivity, and electrical conductivity.

wood

It is yellow-white, has texture on the surface, is not too heavy, can be cut and moved, and can float on water.

plastic

It is very light, will not rust, and has good transparency and wear resistance. easily transformed.

Glass

It is transparent and is generally used in buildings to isolate wind and light.

Paper

Very thin and used for writing.

fiber

It is very elastic and can be used to make clothes.

Natural Ingredients

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.

Items made of natural materials

Wool → cashmere coat, wool

Cotton→cotton cloth, cotton thread

Silk → silk scarf, silk quilt

wood→paper

Leather→leather shoes, leather bags

grains of sand → glass

man-made materials

Man-made materials, also known as synthetic materials, are materials that are artificially processed by chemical methods or polymerization of different substances. Their characteristics are different from the raw materials.

Such as plastic, glass, steel, etc.

Common man-made materials around us are: paper, iron, plastic, glass, etc!

Paper → books, notebooks, newspapers, etc.

Iron→iron pot, iron nails, hammer, iron door, etc.

Glass → glass, magnifying glass, glass window, etc.

Plastic→Plastic basin, plastic ruler, plastic cup, etc.

Nylon→Nylon rope, nylon socks, etc.

Class summary

1. Classification of materials: natural materials, artificial materials

2. People call materials like cotton that come directly from nature as natural materials; materials like plastic that are synthesized by humans are called artificial materials.

Synchronous detection

1. Fill in the blanks

1. There are many kinds of materials, which can be divided into ( ) materials and ( ) materials from their sources.

2. Cotton and coal are ( ) materials, and plastic and nylon cloth are ( ) materials.

2. Connecting questions

Based on your experience, please connect the materials and products on the left and right sides with straight lines.

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For more information about the PPT courseware "Air PPT and All Various Materials", please click on the air PPT PPT and PPT tab.

File Info

Update Time: 2024-10-02

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

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