| A | B |
|---|
| Objects around us are | made of different materials |
| The materials are | plastic, wood, metal, etc.,  |
| We classify materials according to | their origins and properties |
| Materials can be | natural or artificial,  |
| Depending on their properties they can be | flexible, resistant, transparent, etc |
| Natural materials are | those we find in nature. |
| They origin can be | vegetable, animal or mineral |
| Vegetable materials | come from plants,  |
| Vegetable materials examples | wood and cotton,  |
| Animal materials | come from animals,  |
| Animal materials examples | leather and silk.,  |
| Mineral materials | come from rocks and minerals,  |
| Mineral materials examples | marble and iron,  |
| Artificial materials are made | by people,  |
| To make artificial materials | the people use natural materials |
| Paper is an | artificial meterial it is usually made from wood |
| Was invented more than 1,300 years ago | Porcelain,  |
| Materials like paper and glass | can be recycled |
| Recycling means | using a material again after it has already been used. |
| Plastic | was invented in 1862,  |
