Natural and manmade materials
Published on: Mar 3, 2016
Transcripts - Natural and manmade materials
Natural andMan-made Materials
What are NATURAL materials?• Natural materials are materials that come from plants, animals and rocks.
What are MAN-MADE materials?• Man-made materials are materials obtained from natural materials through chemical processes.
Sources Natural Materials ObjectsPlants Wood Chair, table, cupboard Rubber Balloon, tyre, glove Cotton T-shirt, cloth, scarfAnimals Fur Hat, sweater Silk Cloth Leather Handbag, belt, shoesRocks Metal Spoon, kettle Soil Vase, claypot Table 1: Objects made of natural materials
Man-made Objects MaterialsPlastic Containers, ruler, bottle, straw, cupSynthetic cloth Net, tent, raincoat, umbrella(nylon, rayon,polyester) Table 2: Objects made of man-made materials
Natural materials Man-made materials• Wood • Plastic• Metal • Synthetic cloth• Leather• Soil• Cotton• Fur• Rubber• Silk• Petroleum• Natural gas• Coal
• Man-made materials are produced from petroleum.• Petroleum is a natural material.• This shows that man-made materials come from natural materials.
Why Tyre nowadays is moredurable than the Tyre in the ancient time?