1
Natural materials are found in nature.
2
Paper, glass, ceramic, pottery and metals, such as iron and aluminium, are examples of ...
3
Some minerals, such as gold and precious stones, are used to make...
4
Most plastics are obtained from petroleum
5
Iron, like most metals, is obtained from different....
6
The raw material is wood
7
granite and marble, are used in construction. They are...
